I read somewhere that ****possible SPOILERS**** Luke will go to the Dark Side, then return. How true this is, I don't know, but I'm hoping that it is real because that would be awesome!
It’s confirmed that Mark Hamill (Luke Skywalker) will return to his signature role in “Star Wars: The Force Awakens,” but how he will fit into the plot remains a mystery – and it has led to theories that the ultimate intergalactic good guy might have crossed over to the Dark Side.