Nice!
Fuck yes, Mysterion. I love that arc in the series. It put a lot of depth to Kenny's character. As far as your picture goes, pretty good too! I absolutely adore your background and the sort of comic-y style you drew it in. Only thing I can think of to critique is his positioning. Something about it seems a bit...off. I feel like his body should be angled more to the left. But still, not a bad rendering at all.