This "prince of this world" in John 12:31 is not describing that historical event in Rev. 12:7-11 concerning the battle of the angels. Jesus here is clearly referring to something that was just about to happen soon--very soon--within hours. He is speaking about a contrary "prince" as revealed in John 14:30:
Hereafter I will not talk much with you: for the prince of this world cometh, and hath nothing in me.
Jesus knew the disciples that He he had chosen. Three years before the prince of this world was cast out, John 6:64 had revealed:
But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him.
Matthew 13:34-35 points out exactly how Jesus handled "unbelieving" Judas' listening to His words right alongside the "believing" disciples.
All these things spake Jesus unto the multitude in parables; and without a parable spake he not unto them: That it might be fulfilled which was spoken by the prophet, saying, I will open my mouth in parables; I will utter things which have been kept secret from the foundation of the world.
Jesus kept those secret things away from Judas' understanding by those parables so as to preserve his entire purpose on earth. Jesus was required to be put to death by the "princes of this world" in accordance with the words of the prophets, as we see in 1 Cor. 2:7-8::
But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory: Which none of the princes of this world knew: for had they known it, they would not have crucified the Lord of glory.
Yet, the disciples were taught the truth of those mysteries while, at the same time, their meanings were kept secret from the unbelievers, as we see in Luke 8:10:
And he said, Unto you it is given to know the mysteries of the kingdom of God: but to others in parables; that seeing they might not see, and hearing they might not understand.
So, the matter as to just who the identity of the prince of this world actually is must include the matters of Jesus' prayer to the Father in John 12:27-29:
Now is my soul troubled; and what shall I say? Father, save me from this hour: but for this cause came I unto this hour. Father, glorify thy name. Then came there a voice from heaven, saying, I have both glorified it, and will glorify it again. The people therefore, that stood by, and heard it, said that it thundered: others said, An angel spake to him.
Notice that after the above "glorifying", there is to be another glorifying "again". The Question is, "WHEN?" In the very next three verses Jesus distinguishes Himself from that prince who was to be cast out":
…. Now is the judgment of this world: now shall the prince of this world be cast out. And I, if I be lifted up from the earth, will draw all men unto me. This he said, signifying what death he should die.
Continuing to read on in this important narrative of history, no one is cast out until John 13:18-32 which points the finger right at Judas:
….. He then having received the sop went immediately out: and it was night.
THEREFORE, in John 13:31-32, only after Judas was cast out, did that additional "glorifying again" take place as promised:
Therefore, when he was gone out, Jesus said, Now is the Son of man glorified, and God is glorified in him. If God be glorified in him, God shall also glorify him in himself, and shall straightway glorify him.
In John 14:30-31 Jesus explained that He had an urgent message for the believing disciples with not much time to explain BECAUSE that prince who had just been CAST OUT was now COMING to a certain place he described as "hence."
Hereafter I will not talk much with you: for the prince of this world cometh, and hath nothing in me. But that the world may know that I love the Father; and as the Father gave me commandment, even so I do. Arise, let us go hence.
Jesus effectively said, "listen up, pay attention to my words", Get up and let us go to that "hence" where he is coming to. In John 16:25-29, during the time that they were "going", and after three years of speaking to them in parables while Judas was in earshot among them, Jesus abruptly stopped speaking in parables:
… These things have I spoken unto you in proverbs: but the time cometh, when I shall no more speak unto you in proverbs, but I shall shew you plainly of the Father…. His disciples said unto him, Lo, now speakest thou plainly, and speakest no proverb….
Notice that starting immediately after Jesus said, Arise, "let us go hence", while He spoke plainly as they walked in chapter 14, right on through John 17:26, no man "cometh" and no geographic location of that "hence" is mentioned. Then, finally, John 18:1-3 names that "hence" location as well as that "prince who is coming,"
When Jesus had spoken these words, he went forth with his disciples over the brook Cedron, where was a garden, into the which he entered, and his disciples. And Judas also, which betrayed him, knew the place: for Jesus ofttimes resorted thither with his disciples. Judas then, having received a band of men and officers from the chief priests and Pharisees, cometh thither with lanterns and torches and weapons.
Judas is one and the same as Judas in Acts 1:15-20:
Men and brethren, this scripture must needs have been fulfilled, which the Holy Ghost by the mouth of David spake before concerning Judas, which was guide to them that took Jesus. For he was numbered with us, and had obtained part of this ministry.
Now this man purchased a field with the reward of iniquity; and falling headlong, he burst asunder in the midst, and all his bowels gushed out. And it was known unto all the dwellers at Jerusalem; insomuch as that field is called in their proper tongue, Aceldama, that is to say, The field of blood.
For it is written in the book of Psalms, Let his habitation be desolate, and let no man dwell therein: and his bishoprick let another take.
As was referenced by Acts, chapter one, Psalms 109 identifies Judas was that "wicked", who, along with the distinctly and separately referenced "deceitful" Satan, both shunned God's love. Both of these had a "mouth." Judas is the false prophet and prince of this world who will someday rule, having a second "wicked man"--a beastly Gentile ruler--set over him, with Satan at his right hand. Judas, who had the bag while with Christ, will once again hold the purse strings for the buying and selling of all men, rich and poor, bond and free, This portion in Psalm 109 provides strong reason to believe that the mouth of the deceitful belongs to “that old deceiver, called Satan,” that the mouth of the “wicked” belongs to this wicked—Judas—and that another “wicked man”—that Gentile little horn of Daniel—-is to be set over this wicked Judas, while Satan will be standing at his right hand. This is the same threesome of Revelation 16:13—each one of the three having a mouth:
And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet. For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.
Isaiah, chapter 14 depicts Lucifer as being a man, not an angel. Lucifer is that "abominable branch" (Isaiah 14:15-18) "son" of perdition whereas Jesus is that "righteous Branch" (Jer. 25:5-6), "Son of David" (Isa. 11:1) whose name is the "righteous Branch" (Jer. 25:36). Trees are a type of mankind--of the earth--earthy--. Lucifer, the man, is further described as a feller--a lumberjack who fells trees. The famous scripture relevant to this man is in Isaiah 14:12-14:
How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations! For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north: I will ascend above the heights of the clouds; I will be like the most High.
This is merely a chiding from men who Lucifer had previously cut down like trees. Like "look at old big-mouth" down here with us. Lucifer never was above all that is called heaven. Neither was he in heaven. Both Lucifer and Judas are now Dead. Since it is appointed unto man once to die, then afterward the judgment, Lucifer (probably Titus) and the false prophet (probably Judas) having already died, will soon be resurrected, be defeated by the Messiah King of Kings, then cast alive--as resurrected men--into the lake of fire. No man could withstand that fire without being resurrected to do so. Since Satan is not a man, he will not be cast into the lake of fire at the same time as the two resurrected men. His judgment will come at the end of Christs thousand year reign.
Taken from parts of my paper, The Days of These Kings