Ahh yes, but what if it is only Darth's body with Palpatine's consciousness living on in his own apprentice? Could Plaguies not have passed on the way of conquering that skill to his apprentice Palpatine?
Would be a worthy storyline... and even as I left the cinema I was already asking what was up with the Mask, how did Kylo Ren get it? Why worship a fallen dark lord? unless, he wasn't fallen - in his eyes. All food for thought. This fan theory really knitted all the loose ends I had frayed around the story for me... kinda hope this is how it turns out.