Interested to see how and why the emperor will be involved.Also, the end is coming! The end of the saga that is.
His spirit stored in a clone is my theory. This is canon too, he never mastered Plagueis's power of cheating death but he was able to store his spirit away in clones. That or they're going to rewrite history and say he did gain Plageuis's power of life manipulation of midi-chlorians, and in that case I'll be pissed because that's bullstuff.
One question plagues me: is it treason, then?
That wouldn't be rewriting history, he didn't know in episode 3 but theres, what, a 20 year gap between episode 3 and 6 when he gets YEETed down the reactor? He could have found something out between then. I doubt they'll do that though because that would take some explaining and relies a bit too much on past references. They will probably have an explanation thats easy for general audiences to digest.