You know what I find interesting about The Apocalypse? There's no Apocryphon preceding it. But there can never be an apocalypse, without there first being an apocryphon. That would be like writing a review of a book that doesn't yet exist.
Since we have the Apocalypse, we have most of the contents of John's Apocryphon quoted, the golden apples in silver settings. Not all (Rev 10:4), but most. John appears to complete the visions of Daniel, Ezekiel, and Zechariah.
But who, pray tell, illuminated John's apocryphon? Certainly not the Immerser; he lost his head. It seems that perhaps John the Disciple might deserve some credit after all, and that late date may not be out of the realm of possibility for the Apocalypse.
Meanwhile, the world is quite confused by Revelation, as they attempt to view it as the work of a single author, and give it a single date of authorship. That is not possible. First date the apocryphon (~30AD), and then you can date the Midrash (~90AD) provided for the 7 churches in Asia, who needed a little help understanding a book of purely Jewish symbols.
The "apocryphon" is all of Tanach and includes Enoch as well as other sources, (probably Tobit too, and so on), and that is why it is a book of symbols and symbolism. This in turn makes it a veritable "Q" source for the Gospel accounts because all of it is fulfilled in the ministry of Yeshua. It is hidden right before our very eyes but the modern futurist mindset cannot see it because of the literal physical global empire paradigm of death. The one who appears to Yohanan in Rev 1 is Gabriel-Daniel, yeah, that Messenger of the Master was sent to Yohanan, and that is how the vision was "signed", sealed, and delivered.
Perhaps pointed incorrectly:
Daniel 8:15-17 KJV
15 And it came to pass, when I, even I Daniel, had seen the vision, and sought for the meaning, then, behold, there stood before me as the appearance of a man.
16 And I heard a man's voice between the banks of Ulai, which called, and said, Gabriel, make this man to understand the vision.
17 So he came near where I stood: and when he came, I was afraid, and fell upon my face: but he said unto me, Understand, O son of man: for at the time of the end shall be the vision.
??? And so it was, when I had seen myself, Daniel, in the vision, and sought for the meaning; behold, there stood to my face as it were the mirror-image of a Gaber-mighty-one. And I heard the voice of adam amidst Ulai, and he called out and said, Gabriel is the understanding of this one, the mirror-image! Thus he came beside my station: and in his coming I was terrified, and fell upon my face; but he said to me, The understanding is the Son of adam, for at the time of the end is the vision!
??? Daniel 12:13 -- And you walk to the end; for you shall rest, and you shall stand to your allotment for the end of the days! (final nun - yamin - the right hand-side, Rev 1:13-17).
Perhaps that is why Daniel is completely drained, even out of breath, and his spirit "turned against him" in the Daniel 10 vision; for perhaps it is indeed himself that he sees in resurrected form. Perhaps it is almost like going forward in time and meeting yourself: can the two of you co-exist in the same space and time or would the more powerful form drain everything from the weaker version of yourself? This seems to be what Daniel 10 is describing in my opinion; but how would anyone have ever thought to render it with such an understanding as the backdrop? Check for yourself; it is all there if you know what to look for, and Elohim is not Elohim of the dead but of the living, (as shown at the burning bush, in Exodus 3:6, when the Father speaks through Elohey Abraham, Elohey Yitzchak, and Elohey Yaakob, and Moshe hid his face because he feared to look toward ha-Elohim).