Actually, to be honest it is almost certain that will make 1.1 billion without China. Rather, I think it is possible to reach 1.2 or even 1.3 billion. if show staying power through January and not fall quickly. There are indication to continue to show strength.
On the other hand China is too risky, but will see. Hayp and nostalgia and the rest of the world is understandable, but particularly to China is quite difficult to predict because of the reason that when the original trilogy came out China had no market. And just because it does not know how many Chinese fall for Star Wars. But assuming that fall as much as in the US, then the figure will be very big. I'm sure that SW8 will be bigger than current SW7 because right now chinese people will fall to SW Universe....
After asking about China I tell you that I read some article that initial indications are currently about in low end of 200 to high end of 320 million there. Yes in HK, Taiwan and SK SW7 is under perform... The three country usually show how some movie will perform in Mainland (China). But I still believe that SW will blow up there.....