Well here is the issue when you are looking at casting a minority lead.
Who can you find that appeals to EVERYBODY.
Not just oversea folks.
Not just white folks.
Not just black folks.
Not just everybody else.
Some of the guys who fit that are already to linked to superhero roles. The Rock, Will Smith & Idris.
Some are probably too old-Denzel
Some are probably too young. Tyler James Williams
Some are question marks in their roles right now-Marlon Wayans, Donald Glover & Kevin Hart
Some only appeal to 1 or 2 of those groups. Arjay Smith, Khary Payton & Lance Gross
Some NO ONE wants-TI, Bow Wow and a much long than it should be list.
And going with someone new is NOT going to cut it. Especially when you got a well known name playing Hal.
If they are going with Tyrese-it hints to me the following-
You want him in that film to attract that black female fanbase that likes him. Which means you are dragging in their boyfriends & kids.
You want a name everyone knows about with some box office success.
Warner Brothers has worked out some deal for him to this for them and they will do something in return for him. Remember he had a comic book called Mayhem for Image. I would not be shocked if one of the production branches of Warner Brothers makes that into a movie for him.