If Sheev ends up in this movie, they’re doing an incredible job at preventing leaks this time around.
Personally, though I’d like to keep the emperor as a later reveal if watching these movies chronologically. However, Vader I desperately want to see here. I want him portrayed in a way that would add weight to Star Wars, making him the character to truly fear. Seeing him wreck shit on the battlefield could be spectacular, and especially compensate for the ROTS Vader.