If I were a hero, I'd be Martin Luther (Part 4377)....

 Superhero Anydays

Today, by someone named Leonardo Romero, we have an early Avengers lineup, Cap's Kooky Quartet after two team founders rejoin. 

Clockwise from lower right: Quicksilver, Hakweye, Wasp, Captain America, Scarlet Witch and Giant Man. 

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And today we also have a cosplayer doing Invincible. 

POLT