Band on the run: How would Jesus communicate with them? Do they hear an actual voice? How do they discern their private thoughts from those of Jesus? Jesus was puzzling and always doing the unexpected.
First of all, he would not "announce" himself to the Watchtower, of all things!
He would make no formal announcement, but he would be high profile. And you would only know him by his fruits.
Besides, Revelation does not say that Jesus is coming back. It says one "LIKE" the son of man. (Notice John does not call him "son of god".)
It will be a man who has attributes and characteristics reminiscent of the christ archetype.