Just in case the more imaginative wishful imagineers would like to express their ideas please do so here.
Its possible your concept may be used in some manner at a Disney park so be realistic, consider the overall appeal, time to build, impact study upon either removal of an existing ride or to be built new upon a park with free space available (ie,WDW or such) and of course having the unique Disney signature so that kinda rules out off the shelf coasters, tilt a whirls etc.
Concepts should be freestanding and new not something added to an excisting ride such as the DL Peoplemover.
Concepts can be Pixar or Star Wars themed but should offer 20 year or more guest draw in (POTC, HM etc.)
Even complete radical concepts such as a totally owned Disney island nearby Miami that could easily handle the Disney Cruise ships and have enough land area to rival or exceed WDW (WDW Magic has and excellant forum on that concept alone)
OR viable expansion sites globally such as a domed Disneyland in Canada, or far future concepts such as a space elevator to a geosyncronus orbit of a Disney theme park Space station.
If Disney cannot retain visionary imagineers then its possible the fans here can offer concrete viable imaginative and more specifically immersive Disney adventures.
Thank You everyone that wishes to post here, NOTHING is impossible...it just takes a little bit longer to achieve.