With the latest movie in the franchise(Exp 3) bombing in the North American box office this weekend I think we can safely say this will put an end to the series. I think the reasons for its horrible opening might be a combination of its PG-13 rating(the reason I passed on it) and the movie being leaked onto the black market. This has also been a series of flops for Stallone and his movies may start to be scaled back some now as well.