The Book of Revelation is so called from the English meaning of the Greek word apokalupsis from whence comes the term APOCALYPSE
Strongs Concordance
ἀποκάλυψις
apokalupsis
ap-ok-al'-oop-sis
From G601; disclosure: - appearing, coming, lighten, manifestation, be revealed, revelation.
Total KJV occurrences: 18
John's vision included a revelation of Satan's ultimate fate, but obviously Satan's thousand year confinement to the abyss, and his subsequent release that leads to his final conflict at Jerusalem, and his casting into the Lake of Fire hasn't happened yet.
Numerous other events are destined to take place before this happens:
Rev 20:7-10 And when the thousand years are expired, Satan shall be loosed out of his prison, (8) And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea. (9) And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them. (10) And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
As for "the world", Scripture refers to Satan as the god, the prince, and the ruler of this world.
2Co 4:3-4 But also if our gospel is hidden, it is hidden to those being lost, (4) in whom the god of this world has blinded the minds of the unbelieving ones, so that the light of the glorious gospel of Christ (who is the image of God) should not dawn on them.
Mat 4:8-9 Again, the Devil took Him up into a very high mountain and showed Him all the kingdoms of the world and their glory. (9) And he said to Him, All these things I will give You if You will fall down and worship me.
Joh 12:31 Now is the judgment of this world. Now shall the prince of this world be cast out.
Joh 14:30 I shall no longer speak many things with you, for the ruler of this world comes, and he has nothing in Me.
The Word of God is Truth.