Take a look at this! J.J Abrams' production company Bad Robot just tweeted a photo from the Episode VII "workshop", featuring J.J Abrams, Kathleen Kennedy & others with a very familiar Astromech Droid:
Hi from the workshop! #StarWarsVIIpic.twitter.com/9R7JGSfxlC
— Bad Robot (@bad_robot) November 14, 2013
Well, I think that's a pretty solid confirmation that R2-D2 will be back on the big screen in 2015!
Update: Rumor has it that the two men in the center are from the UK R2 Builders Club. Perhaps they're giving the Episode VII crew some Astro Droid making tips?
Also, Frank Marshall, Kathleen Kennedy's husband, tweeted about being at Pinewood Studios today. That suggests that the photo may have been taken there.
Fun seeing lots of old friends at Pinewood, met Cinderella, too!
— Frank Marshall (@LeDoctor) November 14, 2013
"Cinderella" would no doubt be Lilly James, who plays the title character for 2015's Cinderella, which is/was filmed at Pinewood Studios.