personally i like longer sigs that are more sticky.... skinny-ish instead of more blocky/squares like urs.
anyway, ur two stocks are too equal in weight. they each take up half the sig, so theres no center of focus. you might want to remove vegetto or make him smaller.... and u might want to let megamans color show through a bit cuz monochrom color tends to make things duller. it's an interesting border you have there though....
another thing is ur background. i suggest duplicating the later and setting it on multiply or overlay to make it darker....... multiply will darken it, overlay will give u more contrast. try either one, but u need some more contrast to add more depth into your bakground.