In all seriousness, I would be interested if the prequel explores more of what Rambo expressed when he was crying at the end of First Blood: talking about being a veteran and coming home to the brain dead left spitting on him and calling him a baby killer. And (not stated in the movie) that was going on at about the same time, ironically, that the left was starting to promote abortion.
An argument could be made that First Blood was perhaps the first pro-solider movie made after Vietnam. Or at least the first one to be popular.