Just saw the episode.
They credited all the artists except JH Williams III.
Some of those (on paper designs) were cool looking. I personally liked the art for the Plague guy the best but...
With very few exceptions none of them were remotely super-heroes, hell most of their origins were nothing more than Darkman revenge based (including the winner).
Of the final products I liked bird girl the best (but only because she was the most super-heroey of them all).
When I think of Super-Heroes, I generally think of Superman, Batman, Green Lantern, Flash, Spider-Man, etc. Albeit they are all costume and no make up. So in the spirit of this show, making the costume secondary to the appearance I'd think of the Thing, the Hulk, Vision, Cyborg, J'Onn, etc. None of these have blood and gore as a theme. Jim Lee even said at the beginning, that bright primary colors make the super-hero.
Anyways, this was my first time watching the show all the way through (thinking the DC guys and gals were going to be judging). Pretty sure it's my last too.