It's about time I joined in with this venture.
Disneyland
* Unify the theme of Critter Country, as Pooh and Tiana don't mix (though interestingly their films are set in the same year!)
* Bring back the Country Bears, either axing Pooh in a great dose of irony, or create a new animatronic musical dark ride or show that combines various critters together, so the Pooh quota can remain.
* If Murphy gets rebuilt for Fantasmic, make sure he is fireproof!
* Use a concept similar to the one suggested by Theme Park Snark, where a lost Jedi Temple or cave is found in Galaxy's Edge, allowing Star Wars characters to appear there in M&Gs without breaking the narrative of the land every five seconds.
* Expand the Cantina's size to include the original plans for some entertainment.
* Add a third attraction to Galaxy's Edge in the land still available behind the Cantina. Either base it around Mandalorians, or in a pre-Empire rundown droid factory as a shooter dark ride.
* Replace the Fantasyland Theatre with an indoor theatre, or bulldoze it for a new dark ride(s); Tangled, Frozen, B&TB, etc.
* Remove Autopia and re-route the Monorail to make way for either a brand new land or a Fantasyland expansion. One idea is to make a land that anchors the Matterhorn. If Disney were really cheap they could...turn the Matterhorn into a Frozen ride.
* Tomorrowland gets a major overhaul, incorporating a futuristic solar-punk aesthetic with multiple levels to explore, and attractions that fit with the new design, using the likes of Big Hero 6 and WALL-E as IP reps.
* Introduce TMSEP Dreamlights to the park.
DCA
* Replace the Monsters Inc. area with Muppet Studios, returning MuppetVision to its original show building.
* Grizzly River Run needs a proper storyline and something to look at.
* Extended San Fransokyo over the bridge and replace The Little Mermaid with a Big Hero 6 Kuka ride!
* Avengers Campus...
There's all that room at the back of the park. Expand the existing campus or add in a new land.