Soundwave on 29 November 2014
Boyega is not a "random" dude in a stormtrooper outfit. He is one of the lead characters. I'll just leave it at that. In fact really all this teaser does is introduce the new central characters (Boyega, Ridley, Issac, droid, and Sith dude).
Also AOTC already showed that the Stormtroopers even in the prequels weren't "white dudes", that actor who played Jango was Maori (like The Rock I believe).
