If I were a hero, I'd be Martin Luther (Part 4350)...

 Superhero Anydays

Today we have, drawn I'm sure by Jose Luis Garcia-Lopez, a promotional poster for DC comics from 1982.

Clockwise from top: Superman, Captain Marvel, Supergirl, Batman, Raven, Changling, Green Arrow, Mary Marvel, The Flash, Wonder Girl, Batgirl, Wonder Woman, Red Tornado, Aquaman, Plastic Man, Robin, Hawkman, and Green Latern. 

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And today we have, I guess, a family doing Fantastic Four cosplay. 

The Thing (pretty darn good cosplay actually), Invisible Woman (holding possibly Franklin Richards), Mister Fantastic, and a young Human Torch. 

POLT