I think it'll be pretty low-key. From all the rumors, I'm betting the emphasis will be on DCA. It'll be celebrating its 10th Anniversary. By then, Toy Story Mania will be full swing, the additions to the grizzly rapids attraction should be done, and most of the placemaking for the park should be done. And if Al is correct, construction would probably being going full-tilt on the 'Carsland' expansion, and DCA would be in the midst of a rebranding.
I say, give DCA an anniversary, it needs it. Disneyland can get a big celebration for it's 60th Anniversary.