God wins. If I had to summarize the message of Revelation in just two words, those would be my choice. They not only convey the point of the book but also hint at its main storyline. Despite what some overly speculative interpreters would have us believe, the main character in the last book of the Bible is not the Dragon, Beast, or False Prophet; rather, it is God. Revelation is primarily about Christ, not the Antichrist. And the main point of the book is to demonstrate in graphic imagery the victory of God in Christ.
Revelation is primarily about Christ, not the Antichrist. —@TomAscol
Through the incarnate ministry of His Son, God has conquered the Devil and his demons; the world and its deceptions; and sin and its destruction. Through faith in Him, we are also victorious over all these enemies. Because He wins, we also win. His victory secures ours. This truth provides fuel for an ever-increasing joy on the part of every believer.