G.I. Joe - 5/10
Predictable, if only because the Evil Plan and plot twists are largely revealed very early. However, that's exactly the way the television series worked, so you could say that it stays true to the formula. Whether you enjoy the formula or not is up to you, of course.
Korean actor Lee Byung Hun, according to my wife (Korean herself, so she keeps up on these things), supposedly caught Bruce Willis's eye enough that Willis encouraged the director to give Byung-Hun more screen time and better closeups. He's really pretty good, and more than holds his own in this bunch.