EW.com has an exclusive interview up with Mark Hamill about the announcement of Disney acquiring Lucasfilm, and of course about episodes 7,8, and 9, where he revels George Lucas let him know about the new movies last summer. You can check out the full interview in the link below.
I find it very interesting that Lucas would tell him about the new movies ahead of time before the announcement. Could we possibly see the return of Luke Skywalker in Episode VII? I for one certainly hope so!