Some of the latest previews have shown that there is something to do with the parks. At the very least the most recent US trailer shows Space Mountain in the background. A since pulled foreign trailer seemed to show scenes of a kid riding it's a small world and Walt himself. I dunno, but I think there's more than meets the eye with this movie.
As for EO, I knew it was coming and I'll miss it, but I don't mind it retiring. I wish they'd release a collector's edition bluray or something of it though. Intstant buy for me! I'd hate to see that theater turned into just a movie preview center though. Weren't they using the theater at DHS (the one near JTA sign-up) for that lately? I know they've been doing the same at DL with the EO theater. I'd like to see a real attraction take the space.