"The Revelation of Jesus Christ" are the first words in the book of Revelation. "The grace of our Lord Jesus Christ be with you all" are the last words of the book. From the beginning to the end, it is about Jesus Christ. That's the reason it is not called the book of revelations. The Revelation is Jesus Christ.
There are more than four hundred references to the Old Testament in the book of Revelation. The most repeated image is that of the Lamb. That symbol reminds us of the Old Testament sacrificial system and points to the cross of Christ. The crucified One is alive for all to see. He is the "Lamb slain from the foundation of the world" (Revelation 13:8).
The Revelation is Christ. It is not revelations. It is Revelation, singular. It is the Revelation of One, even our Lord Jesus Christ. In the Old Testament, Christ is revealed in prophecy, promise, and typology. Those who understand the book of Revelation are focused upon Christ.
Jesus Christ will return personally and visibly in glory to the earth. That's what the book of Revelation describes in apocalyptic language. It is a book about Christ revealed in power and great glory. It is a book about judgment. Everyone will give an account to God. Christ brings this world as we know it to its appropriate end. Understand the book of Revelation seeing Jesus Christ our Lord as the Revelation.