Could John 21:25 be the last sentence of God's Word ever written (chronologically speaking)? And if so...
Might the Gospel of John be the only book of the Bible written after AD 70?
Twice John writes "the time/hour is coming [and now is...]," John 4:23 and 5:25, if you provide the brackets, do you agree that the words "and now is" appear to be an aside?
Do you agree that in chapter 21 John seems to know of Peter's death and aware that he himself has survived until Jesus' appearing?
If so, perhaps the last verse of the book can be read as a kind of benediction, along the lines of "go out and write books about what Jesus is doing and fill the earth with them," like a mission statement inspiring us to partner with the Lord in all the things he is doing as King.