If this were a lesser movie then you might expect the entire production to just get tossed. Movies have collapsed and never been produced that had less difficult climbs than Mission: Impossible 7. Of course, those movies weren’t the seventh film in a major franchise starring Tom Cruise. Even with the movie business, and the box office most specifically, being what it is right now, there’s an expectation that the next Mission: Impossible will be a success because that’s been the case with every other movie in the franchise. It’s worth spending the time and money to get it right.
Source: Cinema Blend