SilverWook said:
Wasn't there also a rumor Harrison was signed for the next film though?
I remembering reading that around the same time when they said Ford was going to have a rather large role in the film.
I also believe Daisy hinted on returning for the following films, but didn't directly say so. I doubt Disney/Lucasfilm would have a new set of heroes in the following films... they made add some, though.