You did a Fantastic job coloring this!! Actually the word that comes to mind is "uncanny" but that's perhaps to much of a pun (Uncanny X-Men)!
This is wonderful line art to start with ... actually when I first saw it I thought of coloring it. But then I saw your link & WOW. You did better than I think I could have done. I like all the nice little details, like Rouge's freckles/acne (whichever it is). The particle weapon is great too! I also like the "white" lightning.
It was a great surprize to see a hi-rez version to exploit. You know what would be cool is if you would design these as if they were the actual cover page. Maybe go crazy like a brand crossover with Batman vs Wolverine, yet it is a Marvel Woverine cover. A snappy title "Enter the Batman" or something. Then use the actual title graphic.
Like Skutterfly does, but with current covers. [link]