I only know the character as Shazam's villain counterpart through the Injustice games, so I was confused that he'd be the protagonist in his own movie, let alone that he'd be played by Dwayne Johnson, who I'm pretty sure never plays bad guys.
I think you can chock it up as more of a Peacekeeper type role. I think it'll be more of an anti-hero than traditional villain. Black Adam's history is a lot. Really depends on where it ends up in timeline.
man that shot of the rock flying next to the two fighter jets looked so funny to me for some reason. Trailer has me interested though!