Part 1 is Midgar ONLY? Christ. This shit is just full cash grab territory.
I don't see why that matters really. If they've fleshed it out enough to make it a game on its own I think that's fine. The question is can they effectively pad it out without stretching the content too thin and adding a ton of unnecessary fluff. I'm not convinced they can.
I will say that there is A LOT of stuff they could cover in midget though.