All of the Rambo posters are really quite good in execution, albeit a tad hackneyed. The simplicity is admirable, especially the graffiti-styled one, the colors pitch-perfect in each of them. The only trouble is that you don't get a feel for the scope of the film or really the film at all - just the mug of Stallone.
And then there's the title - first they have First Blood, then Rambo: First Blood Part II and Rambo 3 - now just Rambo? Confusing marketing, to say the least.