Darkmoor
Creature from the Black Lagoon indoor boat ride
Super Nintendo/Celestial Flex
Super Mario Galaxy attraction
Super Nintendo World
Luigi's Mansion D-ticket
Kirby and Animal Crossing mini-land (Kirby flat ride and play area, Animal Crossing dark ride, shops, M&Gs, KK Slider streetmosphere show)
Potter
Fantastic Beasts-focused ride
Berk
FoP style ride or another unique 'flying' flat ride
Large expansion pad
Catch all whimsical fantasy land (Wicked, Wonka, etc.), LOTR, or a full Shrek land could all be fun - a catch all futuristic sci-fi area as well