I had a thought on just changing all the fog in the interior to a greenish and possibly add nightsister chanting from the Clone Wars to add to the resurrection aspect. Not a necessary edit but it could be neat to play around with, and if not it’s just another color change option.
This idea deserves a lot of respect!
From an EU perspective, we know that the Nightsisters had resurrection-like magics, and we know that Palpatine cowed them during the Clone Wars.
But the key here is that even without knowing that, it still works. The green is a lovely evil shade that takes us off the usual blue-red Jedi-Sith spectrum and implies that Palpatine has tapped into even more mysterious arcane methods to bring about his return.
I think that this, coupled with changing the vats to have Palpatine bodies, uses all of the established Star Wars rules to far better justify Palp’s return:
Cloning technology + ‘many abilities some consider to be unnatural’ + Nightsister magics => ‘More than a clone, less than a man’.