If I were a hero, I'd be Martin Luthor (Part 4530)....

 Superhero Anydays

Today, I have no idea who the artist is, but he's done damn near every DC comics hero inexistence.  We'll see if I can name them all. 

left to right, top row down: 

-?, ?, Spoiler, Elongated Man, Hawk, Dove Etrigan, Swamp Thing, some Green Lantern, maybe Obsidian

-Deadman, Mr. Miracle, Orion, Big Barda, Mera, Batwoman, the new Black Kid Flash, Miss Marian, Peacemaker

-Agent Liberty, Jade, Dr. Light, Star Sapphire, Constantine, Red Hood, Arsenal, Robin, Katana

-Batgirl, Red Robin, Superboy, Stargirl, Hawkman, The Flash (Earth-2), Green Lantern (Earth-2), Hourman, Supergirl

-Raven, Fire, ice, Black Lightning, Nightwing, Starfire, Wonder Girl, Beast Boy

-Wildcat, Firestorm, Vixen, Steel, Power Girl, Guy Gardner Green Lantern, Huntress, Question, Adam Strange

-Blue Beetle III, Metamorpho, Black Canary, John Stewart Green Lantern, Red Tonado, Captain Marvel, Captain Atom, The Atom

-Mr. Terrific, Blue Beetle II, Booster Gold, Hal Jordan Green Lantern, The Flash III, Zatanna, Dr. Fate

-Green Arrow, Hawkgirl, Martian Manhunter, Aquaman, Plastic Man, Cyborg

-Kyle Raynor Green Lanter, Wonder Woman, Superman, Batman, The Flash II

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And today we also have a Moon Knight cosplayer. 

POLT