There’s the obvious “he doesn’t look like Superman” argument, but if we’re going for colorblind casting approach, he has really proven himself the past few years whether it be his role in Creed or Just Mercy.
Remember all those “Michael B. Jordan could be the next Superman” rumors a few months back?
He’d undoubtedly work hard to match the physicality of Kal-El and knows how to balance humor with drama.
Although Jordan could run into that whole aforementioned Marvel vs. DC clause with his Black Panther role (especially as the main villain of one of the MCU’s finest), why not Jordan?