I think spread
I would think the new gate would be:
25% Nintendo (Mushroom Kingdom 10%, Donkey Kong Country 7.5%, Hyrule 7.5%)
20% DreamWorks (Shrek, HTTYD, KFP, Madagascar, Trolls and Croods in a Fantasyland type village)
12.5% Middle Earth
12.5% Transylvania
10% original land
15% expansion space (three 2.5% expansion pads would make sense)
5% entrance plaza/street
Pokémon replacing Toon Lagoon does sound like a good fit (Popeye rethemed, Me Ship the Olive overlay; rest of TL levelled for E-ticket family coaster, D-ticket dark ride, C-ticket show, new shopping/dining plaza, B-ticket flat ride and A-ticket splash pad/play area)
LC is a wildcard. Same for KidZone, in this scenario.