From ComicBookResources.com
Confirming that yes, he was indeed given a choice between playing Black Adam or the title character in the upcoming "Shazam" film, Dwayne Johnson elaborates on why he opted to go with the less-than-pure Adam over the more straightforward superhero.
"All due respect to Shazam, Billy Batson, it's a mythology that I love, it's been with me for almost 10 years now," Johnson told Digital Spy. "I just inherently felt Black Adam was more interesting to me, because I felt like there were more layers to Black Adam, starting out as a slave and then ultimately becoming the anti-hero who we enjoy today."