This discussion of Welles' reluctance to appear on camera reminds me of Stacy Keach's anecdote in WORKING WITH ORSON WELLES about Welles using a false nose for his role in Butterfly, which turned out to be the exact same shape as his real nose. Obviously, Welles preferred to hide his real self under heavy make-up, false noses, etc. Either that or to simply make a living with his voice, which was always his bread and butter anyway. If they ever do complete THE OTHER SIDE OF THE WIND, the one element missing will be Welles himself. I believe it's the only film of his in which he does not appear either in voice or in body.
If Welles was serious about having others complete THE DREAMERS, he could easily have recorded all his dialogue and then have his character seen only in shadow or at a distance, so his voiceovers could be used, Darth Vadar-style. Obviously Oja would have to be replaced, but then she may have been one of the main impediments to getting funding for the film in the first place. There's no evidence that she had any acting talent other then what Welles could have coaxed out of her, and potential investers could have been turned off by the idea of Welles trying to turn his mistress into a star, ironically like Hearst with Marion Davies.
Glenn, I liked your article on THE MAN WHO SAW TOMMORROW. If Welles rewrote most of the commentary, as the director said, and thus reinterpreted Nostradamus's prophecies, I would think that would make it more of a category 2. BTW, have you ever seen the video for the later documentary NOSTRADAMUS, HIS LIFE AND PROPHECIES? The picture of Nostradamus looks exactly like Welles.