It seems based on the OS performance. Brevet at BOM is coming up with the same number:
Internationally, however, X-Men: Apocalypse is delivering. The film brought in an estimated $84.4 million this weekend, which includes an estimated $59 million in China, the second largest Fox opening in China behind only the Titanic re-release and $20 million more than Days of Future Past opened with. The film's international total is now up to $286 million, bringing its global cume to just over $400 million, currently placing it within the top ten for 2016. Should this trend continue, Apocalypse would end somewhere around $650 million globally, which is about $100 million less than Days of Future Past.
http://www.boxofficemojo.com/news/?id=4194&p=.htm
I guess we'll see.