No matter where Disney releases Episode 8 I feel it can get a 250M Opening Weekend. I feel it can have a little over a 3x multiplier and get 800M. Personally.
40% drop isn't bad. Imagine it will drop between 50-55% next week and start stabilizing again. 35-40% drops throughout January after next weekend. 1B is still in play.
EARLY prediction... Likely to change whenever we actually get something concrete for the movie:
OW: 105M
DOM: 520M
International: 1.3B
WW:1.82B
I believe this movie will do excellent. Just not on the same level as the first.