Is the emporer really gone????

Rating: 8/10 (24 January 2007)

I just finished watching ROTS and was confused by something at the end. I cant remember all the names of the planets or exactly the dialog but this is pretty much what confuses me.
At the end of ROTS yoda tells Obi Wan that there is a new jedi trick to learn while watching over Luke, he is told that the trick was from Obi Wans old master. It is assumed that this is the power that allows Yoda/Old Anikan/Obi Won to be seen and communicate with Luke at the end of ROTJ, kinda like a way to exist forever but not to live.
We know that Obi Wans old master told Yoda, and Yoda told Obi Wan but who told/taught the trick to Anikan??He didn't know this at the end of ROTS so it must have been the emporer that taught this or showed this to him. This of course bring up the question..Is the emporer really dead/gone.
It would make an interesting spin off or next installment, with the story line basically being a young man is the next sith and is being trained and communicating with the emporer, perhaps try to find a way to bring him back, OK now im just rambling.