I thought this was just a joke, on The Daily Show or The Colbert Report (forget which one), but according to the IMDB, Rambo IV is actually in pre-production. http://www.imdb.com/title/tt0462499/
Jeez, what’s Stallone thinking? He didn’t embarrass himself enough with II and III?
Of course, it should really be Rambo III*. So far the movies have been:
First Blood Rambo: First Blood Part II Rambo III.
So there was never a Rambo II. Rambo III should have been, I guess, Rambo II: First Blood Part III, which would make the new movie Rambo III: First Blood Part IV. I blame Francis Coppola for this, as for so many things.
Let me scare people here. But the rough treatments mentioned there could turn into good stories. An aging champion coming to grips with middle age could be good.