All I can say is that if this does end up to be true...I REALLY hope Disney has something big up their sleeves for Epcot, because with New Fantasyland, Avatarland and now potentially Cars Land, Epcot will be the only one of the four WDW parks not having any significant work being done to it within the next few years, and it could really use the attention.
I know 'Test Track' is getting refurbished, but I don't really count that since Chevrolet, not Disney, is the driving force behind the project (no pun intended) and from what I've read on various sites, it seems like the refurb was actually forced on Disney because Chevrolet threatened to end their sponsorship if the attraction wasn't updated (apparently Disney didn't want 'Test Track' to be down while they were working on 'Big Thunder Mountain' and New Fantasyland over at MK at the same time, as well as for the Epcot 30th Anniversary this fall).