I would dedicate an area to Walt's crown jewel, Mary Poppins, which is criminally underrepresented in the parks.
The area would be called Cherry Tree Lane. It would consist of a tea/gift shop called Uncle Albert's (and there would be AA's of Mary, Bert, the Kids and Uncle Albert having a tea party on the ceiling, as per the film) where you could sit and have refreshmentst. Outside, there would be Pearlies (the street players featured in the Jolly Holiday part of the film) to entertain guests. Then there'd be Admiral Boom's, a house with a ship on top of it, just like in the movie. The ship's cannon would go off every hour, and live actors portraying the Admiral and his first mate would interact with guests below. Inside Boom's would be a 3D show like Mickey's Philharmagic, where we would travel with Mary, Bert and the kids on their adventures as per the film, culminating with the fireworks exploding over the chimneytops (the 3D would require us to dodge Roman candles and the like) as the finale. Then we would exit through a parlor where there would be a meet and greet with Mary and Bert.
Ideally, this attraction would be at MK, but it would also fit pretty well at DHS.
Another ride I'd like is one I call Disney's Jungle Lands, and it would be a dark ride taking us through the worlds of Tarzan, the Lion King and the Jungle Book. It would, of course, be in AK and of COURSE, it would replace that stupid Avatar ride.