My biggest concern is that America let down Avatar 1. Internationally, Avatar did much better. Heck, even in Canada Avatar is still the biggest grosser, bigger than TFA.
And what did Avatar do in US? Just around TDK admits, which of course is GREAT HUGE, (choose your praise) but not like Canada or UK where it was like 30-40% more.
TBH I would actually expect A2 to do same or grow over A1 to be closer to how it will perform in UK, CAN and ROW. If NWH can do 60M+ admits in US, A2 should do much BETTER.