If I were a hero, I'd be Martin Luther (Part 1281)...

Superhero Anydays

This looks like George Perez, but I can't be certain that it is.  Nonetheless, whoever made it, this is Shadow Lass, member of the Legion Of Super-Heroes, from the planet Talok VIII.

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And today we have some cosplayers doing the Avengers.

In the front we have: Yellowjacket, Iron Man, Captain America, The Wasp, and Thor
In back: Quicksilver (I think), Hawkeye, The Vision, and Scarlet Witch

POLT