Lucas: Hamill, Ford and Fisher will return

[Darth Yan]

It depends. If luke is the big good mentor who serves as the obi wan, rather than the hero, he could be fine. The idea of him starting a jedi academy and training students was actually not a terrible idea EU wise, the problem was that he was made the protagonist for the most part, meaning they had to nerf him somehow (the injury he suffered from Kueller). The unifying force used him well, since Jacen was the one who faced Onimi the big bad, but most don't.