I would have to agree with Star. I think it's the way Logan is flipping through the air. Its like he is diving off a High Dive Board or was just tossed in the air by Sabretooth or coming out of back flip jump from behind, jumping off something like a rock wall (which could be placed in the scene).
One thing you may want to try is creating a camera from each of the Characters Point of view. This would be just to help you, not necessarily to be used in the final render. I think it would help in over all placement of the characters in the image
i dunno. i think you might have went a little overboard on the extreme angle on this one. i like the camera angle but the figure poses are not flattering at all not to mention all the negative space you have on the ground. seems like there should be a body or two lying there. suits look great though!