Yep, although it might be a bad location for the final boss fight given how epic they like them to be. Maybe they'll do it at Mt Nibel instead.

I do definitely think we'll get to Nibelheim in Part 2 though. If for no other reason than the simple fact that they need to design that whole area for the Kalm flashback. So it just makes good sense they'd reuse it during the same game for the sake of sharing storage space. Otherwise they need to put that whole area into 2 different games.

That's assuming they don't go with any kind of open-world approach anyway, in which case they'd need to put the same areas in all future games.