From what I understand these lands were not meant to be built immediately. I think they’re focusing on Marvel right now and then they’ll focus on others. I think I heard somewhere they’re supposed to be completed by 2025. I may be wrong.
I think it has more to do with seeing how long the Frozen hype will last, instead of copy/pasting everything in every park. Disneyland Paris has always had a limited offering of Frozen stuff, in comparison to the other parks. You cannot meet the characters from Frozen, etc.
I still hope they 'let it go' and expand the Ratatouille area with all the movies set in France. Beauty and the Beast, Hunchback and the Aristocats But eitherway, they can only do one thing at a time and Marvel comes first.