I watched Return Of The Jedi last night and caught something that I never gave much thought …when the Emperor tells Vader to go to the sanctuary moon and wait for Skywalker , he does not arrive on the moon until after nightfall .In the scene right after Vader has his talk with Palps ,the rebels land on Endor and a full day passes into night before Luke goes off to meet Vader . Was there that much travel time between Death Star 2 and Endor via shuttle ? Or did Vader go off and meditate for a while before departing ? I guess this could be open to a lot of speculation .
Also Luke says to Leia “Vader’s here - on this moon…” when Vader hasn’t landed yet.
Maybe there are several Vader clones and that’s what TROS will reveal…