There are so many rumors going around relating to basically the entire WDW resort that it's impossible all of them come to fruition: GMR to Mickey, massive Epcot overhaul (involving potentially GOTG, a revamped Mission: Space, a possible new country, and much more), WRECK-IT RALPH taking over Stitch, and now a Figment/Dreamfinder attraction coming to Magic Kingdom (presumably a replacement, rather than an expansion).
Do I think versions of all of these may have been pitched? Absolutely. Do I think they're all happening? No, because it would represent (when taken alongside Avatar, Toy Story Land, and Star Wars Land) the greatest era of park-related activity since the late 1980s - early 1990s, which I don't think Bob Iger or anyone at TDO have any interest in seeing.