Yes, yes, you are. But I'm not, nor never have claimed to be, cool/lame enough to work at a comic book store so...
He's been around since Golden Age. He has artificial weeks that let him fly, super-strentgh and senses (depending on the Age), communicate with birds (depending on the Age) and he likes to use old school melee weapons like his mace. He's never been a front-line hero for DC and was just kind of tacked on to the JLA/JSA. That's my two cents and knowledge.
The story on the banner is that my wife found these vintage style character posters and we're going to re-create them on canvas to decorate our boys' room. I saw the files up on Photoshop and asked my wife to show me the ropes on making a decent looking image. The letters are the font from Red Dead Redemption.