Basically, I figured out the could do a park called Celebrate America! (Ik a pp talked about America Gardens, but never elaborated) Basically, you enter through a Colonial Main Street, up to the central icon that represents America (ex. an eagle, statue of liberty, mount rushmore, something like that.) The park is divded into five sections: northeast, southeast, southwest, northwest, midwest/great plains. They're located like the would be on the map (so se would be where tommorowland is in mk, ne where toontown used to be, midwest where fantasyland is, etc.) here's my rough ideas for each land:
Colonial Main Street: shops and a dark ride going through the history of America (basically an American Adventure GMR, or something like it)
Northeast: basically, have a Coney Island style boardwalk, with games, wooden roller coaster, ferris wheel. then you could have a ny crazy taxi simulator, or something like that. Could also have a revolutionary war display if you wanted to.
Southeast: since WDW is in Florida, you could have a California Adventure-like section, celebrating Florida, but include other sothern states here too. You could have a Song of the South resturant (saw this posted by another DiSer so I give them credit for the idea, whoever you are.) maybe a coaster based off something, but def. needs an e-ticket.
Midwest: not really sure what to put here, need help with this one. (not trying to diss the midwest or anything)
Northwest: have an Oregon Trail rapids ride, (something like Grizzly River Run), maybe add a "mountain ride" like EE with a backstory around a sacred native american mountain
Southwest: If you include Cali in this, you could move Soarin' here since it is Soarin' over California. Maybe take a few ideas from DCA (never been there, so not sure what Cali-themed rides they have there) maybe have a ride based off Roswell aliens or something, but might get in trouble with the governemt because of that.
So yeah, this is basically my idea, if you have any suggestions, I'm open to them.