If you're going to a RAMBO movie, don't complain about the violence and predictable plot. You KNOW who's gonna win, and you KNOW the main character is going to go over the top to get righteous revenge. You want to follow this character, a guy you kinda love despite his flaws, to the end. Now Rambo is gnarly and old, tender and tough and seemingly still paranoid too. He is trying to lead a quiet life away from the battlefront, living these golden years as only Rambo would , on his ranch, tending his horses and building his underground bad guy boobytrap lair.
You will go to this movie to see what happens in the end - not just of the movie, but of RAMBO the man.