If I were a hero, I'd be Martin Luther (Part 2560)...

 Superhero Anydays

Today we have Canadian John Byrne's version of some members of the JLA.

Clockwise from lower left: Zatanna, Green Lantern, Hawkman, Elongated Man, Batman, Green Arrow, Black Canary, Flash (kneeling) with Atom on his shoulder, and Superman in the middle.

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And today we also have some Legion of Super-Heroes cosplayer sitting around a table with the Legion flag on it.

XS, Polar Boy, Star Boy, Cosmic Boy, Lightning Lad, Dawnstar, Superboy, and Invisible Kid.

POLT