With the new movie being called a spinoff and not the next official entry in the franchise, it would seem that the new movie is different somehow from the movies that we've seen, but exactly how is far from clear. Sylvester Stallone is apparently in the movie as he'll be filming in October, but beyond that, things could perhaps be very different. While he's in the movie, it could be that the new movie isn't about him or his friends and focuses on other, perhaps new, characters, that would at least explain why the movie is being called a spinoff.
