So, it's become that one relative nobody ever wants to mention by name at Thanksgiving dinner? As much as some people would like to forget those movies exist, it's simply not going to happen. It's called The Star Wars Saga, not the two movies we really like, plus the third one we don't like as much. ;)

Not referencing the PT at all would be pretty distracting. (And TCW is better than the prequels by a mile.) I don't see how they could even avoid mentioning Coruscant at least once. It would be like a political thriller not making mention of Washington D.C.

As I've said before, it seems pretty clear Yoda was sensing Mace die in ROTS, so I don't see him coming back. Unlike Luke in Cloud City, he got fried pretty good by Palpatine.