20b is a bit crazy.
Just pulling numbers out of my butt- 1.5b at HS, 1.5-2b at MK, and 5-7b at epcot.
Epcot is really the only unrealistic expectation of what needs fixed at WDW. But that's on them- they've let it get into the ridiculous state of disrepair it is currently in.
But ponder on that root problem. ~10b just to get Disney to where it should be. And people would want to throw Marvel
on top of that? Id rather have some tremendous attractions across town in 3 years than the dream of an attraction in 15 years.
My kiddos are too little for Uni- but I cant wait until they are