I'm kinda torn on this topic..... On one hand, I think it could be cool with a well thought out plot to include a number of Force Ghosts like Anakin, Obi, Yoda, and even going as far as Qui-Gon and/or Mace. This could be cool in that it might deliver a little more in terms of what GL promised us all about the PT in terms of answering questions about Jedi that disappear when they die. It's not that I didn't get the underlying things in the PT that add up to the "retaining ones self", but perhaps a more straight forward presentation of these things was expected. The biggest problem I have with this thought is Obi-Wan. I really liked Ewan as Obi in the PT, but I don't like that his likeness has kinda taken over as the face of Obi-Wan. If they did a Ghost Obi in the ST, I would hope they CGI Alec and perhaps have Ewan voice him. I would love to see a scene where Anakin comes to Luke and says "We have a new enemy........" One the other hand, I think a simpler use of Force Ghosts that is more in line with the mirroring themes that have been established would work better. This would be along the lines of Luke taking someone under his wing in Ep VII, and return to this "new generation" hero much like Obi-Wan did to him. My problem with this avenue is that I would be afraid that the lead in to such a storyline would be too disconnected from what we know already and not really continue the story forward, but rather feel like it was starting over.