Originally Posted by Alexei Belyakov
A poorly received movie that made $85 million Domestic in its opening weekend & $180 million total got a sequel.
All this film has to do is match the above numbers and we'll get another film.
That's what you assume. X-men was still a bankable franchise after Last Stand, but they weren't interested in making a direct sequel and instead chose to pursue spin offs. We don't know if they intend to follow up The Wolverine or what other X-films they might want to concentrate on. It's never set in stone.