Yes he was searching for immortality, then got killed, i doubt he still has his lab in the after life. When did they talk about netherworld in the films? (Serious non argument question). Not sure who will be baddie honestly, Bounty hunters were really built up in TCW, and i imagine the mortiss stuff will be involved somehow (Luke becoming the one to take over balancing the force?). I wouldn't even have a problem with plagueis or sidious in ghost forms, i just dont want them being the main villains and having to goto star wars hell to kill them.