I haven't the links, but Mark Hamil and Carrie Fisher are in.
As long as it was collaboration, we'll get a better product. What made the prequels what they were was a lack of it and complete toadying yes men. All Lucas films would have been terrible, and it's come out that if he didn't get collaboration with the original trilogy, the films would have been completely terrible. C3-PO was a Jewish stereotype at one point.Seems like Lucas was working on the sequel trilogy even before the sale to Disney. He was also in talks to get some of the original cast into the movies, as well as consulting Michael Arndt -- screenwriter of Little Miss Sunshine and Toy Story 3 -- to write for Episode VII.