Let's be honest, Nintendo could carry a whole park. Have Mushroom Kingdom (Fantasy Land), Hyrule (Adventure Land), Pallet Town from Pokémon (Frontier Land), Corneria from Star Fox/Metroid area (Tomorrow Land), with DK Island and Pop Star (Kirby) as "sub-lands" and you literally have Universal's direct answer to Magic Kingdom.
Future expansions can use those franchises, lesser known Nintendo franchises, or even partner with Capcom/Konami/Blizzard from other popular games (available on Nintendo systems).