SilverWook said:

Mark is probably key to all of all this. Disney wants to get us old fogeys into the theaters. ;)

Not necessarily if any of the ot actors refuse to be in it they can write it into the story that their character died. Like they did with Sean Connery in Crystal Skull.

To me the worst thing that can happen is Hamill says no. Its not like its going to do anything to hurt his career at this point to be in it, but it won't further it either. Unless they offer him a large sum of money i don't see him doing it.

I hate the idea of a younger cast coming in with the oot actors basically being wallpaper. I want further adventures of Luke Skywalker. But are we not basically facing the same ludicrousness of Harrison Ford as Indiana Jones in Crystal Skull at 60+ years old with Mark being as old as he now is.