One thing that can be said about the Rambo franchise is that after Rambo III, the franchise has been on a rather rough journey. The 4th film in the franchise has not been released until 2008. Even at release, it was assumed to be the final film in the franchise given that one of the suggested titles was John Rambo. Also, the ending of the 4th film can be considered as a fitting end to the saga because it shows John Rambo returning home. However, Sylvester Stallone has said on numerous occasions that he was not done with the story and has made plenty of attempts to get a 5th one going.
Now, it has been confirmed that it is happening. A teaser poster for Rambo V has been released with a release date among all things. The release date has been set for fall of 2019. This means that production has to start pretty soon. Meanwhile, Sylvester Stallone is working on the Creed films and reprising his role as Rocky Balboa. This of course is a nostalgic moment for fans of Sylvester Stallone because he has often worked on Rocky and Rambo almost simultaneously at certain points in his career.
Other movies that he has yet to released but are reportedly finished are Escape Plan 2 and 3. There are also rumors that Sylvester Stallone is working on another movie in The Expendables franchise. One thing that can be said for Sly is that he is prolific in his roles. He is always involved in some kind of project. The next Rambo has at one point been reported to be the last Rambo with a possible death scene for the veteran.