I thought a lot of the Fantastic Beasts films took place in the Muggle World, hence why they wouldn't be as interesting for the basis for a land. But if the MOM ride was set in the 20's with a bunch of characters I don't know, I'd still be incredibly interested in riding it. I love Gringotts for the ride and experience, not because I care about whatever movie it was based on (I couldn't tell you.) Universal got my money not because of which films they leaned towards in a Franchise, but because they created fantastic theme park experiences with a Franchise that allowed it.
Give me a fun ride with practical sets, some animated figures, a little magical surprise or two, and good narrative structure and I'm interested, regardless of the IP or, as you're saying, the chapter of the IP.
New Hope is a great film, but not even my favourite Stare Wars story. That would be Andor. New Hope is right behind and followed by Empire, but then Force Awakens and Last Jedi. All of the eras of Star Wars have some gold and some junk. Not one of them is close to perfect or well-made narratively. So to say that basing the land on new successful films was a mistake is kind of silly, considering they are what many park guests, especially kids, know and really enjoy. Not the movies made almost 50 years ago.
And it sounds like you wanted a non-immersive land. A collage of different locales and planets all mashed up together?