If they did bring in Palpatine, it’d be canon...sort of. I know (according to the ‘Star Wars’ comic books) that Palpatine made several clones of himself.
However, I doubt very much that Ian McDiarmid would want to play him again.
Yes. exactly!!!
Good point...he was the best thing, acting wise, from the prequels IMO.
If McDiarmid was to reprise the role, then there’s a 2% chance these films won’t be complete dogs.