Are you saying that John knew Jesus would be revealed at a later date? Or was Jesus revealed to John before he wrote the book of Revelation down?
I said
Maybe I should ask you what you mean by revealed.
But it is very plain to see that John knew God and Jesus.
Rev 1:1-6
1 The Revelation of Jesus Christ, which God gave Him to show His servants-- things which must shortly take place. And He sent and signified it by His angel to His servant John,
2 who bore witness to the word of God, and to the testimony of Jesus Christ, to all things that he saw.
3 Blessed is he who reads and those who hear the words of this prophecy, and keep those things which are written in it; for the time is near.
4 John, to the seven churches which are in Asia: Grace to you and peace from Him who is and who was and who is to come, and from the seven Spirits who are before His throne,
5 and from Jesus Christ, the faithful witness, the firstborn from the dead, and the ruler over the kings of the earth. To Him who loved us and washed us from our sins in His own blood,
6 and has made us kings and priests to His God and Father, to Him be glory and dominion forever and ever. Amen.
(NKJ)