Re: Star Wars Episode 7 - 2015
Why would the Emperor save, and keep, a half-assed (literally) version of Vader around when he could defrost the Anakin clone and get a full powered version to be his personal gang banger?
If they want to bring Vader back physically, I'd actually be more okay with tying it into the underdeveloped prophecy idea. Anakin was a virgin birth with unusually high force potential. Reincarnating him though the force or having him resurrect Gandalf style are - if not ideal - more narratively satisfying solutions than just cloning the guy off an assembly line.
'Spock is always right, even when he's wrong. It's the tone of voice, the supernatural reasonability; this is not a man like us; this is a god.'
- Philip K. Dick