As a Christian prophecy, the Book of Revelation deals with whatever you want it to deal with. Scholars would say that the book is of little value either historically or theologically.

The early Church Fathers had such a low opinion of the value of Revelation that the second century Roman teacher, Gaius, called it "heretical" and claimed that it was written by John's worst enemy, Cerinthus. Eusebius (260-340 CE) listed the books considered for inclusion in the New Testament, saying that Revelation was "spurious".

Like all the New Testament gospels, the Gospel of John was written anonymously.

Exactly when John came to be associated with the Gospel is not known. The earliest attestation that these were regarded as having been written by 'John' is found in lrenaeus' Against Heresies, dated about 180 CE. This was the only gospel that mentioned a "disciple whom Jesus loved", and some Church Fathers, in examining the text to establish the disciple's identity, felt that they could rule out all the disciples that the gospel mentioned, except John. A brief sentence in John 21:24 then led to the conclusion that the author of the book was actually the "disciple whom Jesus loved", and therefore John.

The Gospel was popular in gnostic circles and may originally have been a gnostic gospel. It was first attributed to Cerinthus, the founder of a gnostic sect.

All we know about the Book of Revelation is that it is signed by 'John', who wrote from the island of Patmos. At some point, the Revelation to John of Patmos was associated with the John's Gospel solely because of the common name. Later still, Christian traditions arose as to how the Apostle John must have found his way to Patmos in order to write the book from there.

Because of the association with the Apostle John, Revelation was preserved for posterity and given the status of an apostolic writing. Even so, there were doctors of the church who questioned its authenticity and complained about its theology.

The second century Roman teacher, Gaius, called Revelation "heretical" and claimed that it was written by John's worst enemy, Cerinthus. The Church Father, Eusebius, called the Book of Revelation 'spurious'.

There were not only serious doubts in the early Church as to the authenticity of Revelation, but we now know from analysis of the text that it was not written by the Apostle John at all.