Very nice! First, let me commend you for doing a piece featuring Power Girl and Supergirl that isn't so overtly sexualized. It's nice to see both characters represented a little more tastefully. Something else I appreciate this piece is the differences between the two. It's quite clear to see PG's more curvaceous (and muscular) frame in contrast to Supergirl's more slimmed down frame. The shading you've done for this piece is interesting and really reminds me of the style used for MvC3. The only thing I'd liked to have seen was a more distinctive height difference between the two.