cap said:

A while ago there was discussion of dissatisfaction with the Emperor referring to Luke as “Young Skywalker” and some suggested in might be possible to make him say “Luke Skywalker” as Clive Revill did in 1980. What has become of that? Did it turn out to be possible, impossible, or yet to be determined?

^ This is something I'm really hoping will make the edit, so that we'd have the best possible incarnation of that scene. Around the time of that discussion, adrojo posted some mock-ups to YouTube in which s/he demonstrated the high possibility of inserting 'Luke' into the dialogue; in my opinion, the best mock-up (and what I think was the final mock-up done on the matter) is http://www.youtube.com/watch?v=lRAuVstzOv8&feature=related.

As someone already commented on the video, all I really think needs done to the 'Luke' there is some additional echo, and maybe some slight level adjustment. But if it can sound that seamless after only minimal editing, I'm holding out hope that it can make its way into ESB:R.