Not having seen the movie I can't say. I think they could bring Mara back, but only in the games/books. They could easily just erase her past with Luke since she existed pre-ROTJ. The downside is like Bryancd says the character has a lot of baggage. I still haven't seen anything about Lucas hating the character (c'mon post some quotes already! ), but I think overall it might be hard for some of the really high profile Legends characters to be brought back in. It could be done though. So far, from the outside looking in, it looks like Disney is not looking to bring back the good SW authors (Zahn, Stackpole, etc.). I know the one I read (Aftermath I think) the author didn't seem to really know SW.