That's what Revelation is all about. It's how Jesus fulfils all of God's promises in the Old Testament. Then make a real effort to know and understand the Old Testament. Read the whole Bible as God's progressive increasing revelation of Himself, which ends in Christ. When we read Revelation as an unveiling of the one who fulfils the Old Testament, its meaning becomes much clearer.
Revelation is also like the conclusion to an essay.
Some of our congregation have been doing their HSC exams this week. They should know that when you write an essay, the conclusion doesn't contain new material. Revelation is in a sense the book we could do without, because it is a summary of the Bible. It doesn't really introduce anything new that hasn't been written earlier. What is new is the style in which it is written.