Mark Hamill will be channeling Obi Wan in Episode VII (I hope they trim the beard a bit. He looks like a hobo.):
Apparently, he's also contractually obligated to keep the beard until shooting of Episode VII is finished.
Also, here are some rumors regarding the story:
ComingSoon wrote:First up, Latino Review has several plot details, building on what has been previously been alleged regarding Luke's missing hand serving as the story's MacGuffin. The search for Luke Skywalker, then, teams Daisy Ridley and John Boyega's characters with Han Solo and Chewbacca (who have passed the Millennium Falcon along to Oscar Isaacs' character).
The new rumors reveal that Luke is a captive of the Inquisitors, the villains of the upcoming "Star Wars Rebels" television series. Sort of a Sith task force, the Inquistors used to deal directly with Darth Vader and seem to have captured Luke shortly after the events of Return of the Jedi. What's a neat surprise, if true, is that flashbacks will actually show off a time period prior to the events of the original Star Wars and we'll get to see Darth Vader on the big screen again! What's more, Billie Lourd is rumored to be playing a young Princess Leia in some of those flashback scenes.
Next up, Badass Digest has a few more descriptive details, claiming that there's a central Inquisitor villain who is a half-metal cyborg and the owner of the hand we just saw officially revealed by J.J. Abrams. They also allege that we'll see a planet of both ice and forest where Imperial Snowtroopers are building a superweapon!
Finally, Indie Revolver has published alleged concept art of Han Solo in both a Hoth-like uniform and also in a look a bit more reminiscent of the long coat he wore on Endor. Badass Digest then chimes in again, claiming that Solo and Chewbacca are now in charge of a Super Star Destroyer.