The controversy had no discernible effect on the movies box office tracking and it's soft bow is because the movie wasn't that good. Also you can't sue somebody for reporting a factual claim, the same as the pedo can't sue her for telling everyone that he's a convicted sex offender. Either case would be thrown out. Now if she went around and didn't market the movie or actively did something to disown it before or during it's release would be another story. Yet it didn't even matter.
However this won't have much of any effect on Shane Black's career. Especially when it is obvious the studio interfered. Which is what happens. They recruited him and overall it was the product he produces that they received. Munn on the other hand, has probably done some damaged to her acting career. That comes with the Territory but I doubt she'll be able to accept it in the long term. Yea it's a sexist thing, if Black did what she did no one would care. In fact no one really cares about him hiring his friend. He was edited out for public relations and that's just business. Get scolded, say sorry; rinse and repeat.
There's not going to be a sequel. The films lack of success doesn't warrant one. It's sad really. Black isn't going to hurt in any way by this failure. Munn may have stifled if not done permanent damage to her career. Worst of all the hundreds of thousands of hard core Predator fans just got place on the back burner "big screen" wise. However as others have said, the rest of the franchise is doing well comic wise. How the gaming side of things?