Sylvester Stallone is a bona fide Hollywood legend – especially regarding his work in action flicks – with dozens of movies to his name, many of which have had sequels, but a handful of which audiences are still waiting to see follow-ups for today. The Rocky, Rambo, Expendables, and Guardians of the Galaxy movies in which Stallone has appeared are all franchises with at least one sequel in which the star has appeared. However, seeing sequels to some of his best standalone films would be great.
https://screenrant.com/sylvester-stallone-movies-need-sequels/