Although I'm sort of curious to see what the sequel to this will consist of, I'd rather Pitt were in better films. Oh, well. I bought a ticket to this; I accept the consequences.
I'd be very surprised if they make a sequel unless Pitt does it virtually for free. The film cost $190 million to make and its unlikely at this point that it will even break even. Paramount which owns the rights currently to the film and IIRC the film rights for the book isn't likely to sink more good money after bad on a franchise that cannot make them $$.
Shit at this point also expcet to see a scaled back Trek for the next film and it's on Track for a 50% profit margin for Paramount which was also under expectations as well.