Good for Business: He's a person of color
Black Panther was one of the highest grossing movies of all time. Compared with the flop Batman vs. Superman, which was headlined by two white actors, it is a massive success story not only financially but with regards to how society perceives its heroes.
For the longest time, the hero was predominantly white, but that is changing. Roman Reigns represents the Samoan people and does so quite well. With fandom tiring of 'lame white guys' it's nice to see a person of colour in such a prominent role.
Edited by Shruti Sadbhav