In response to the news HERE, though the Michael B. Jordan casting was known well before it was finalized today.
I do have misgivings with the castings (namely that Sue Storm was cast as Kate Mara, a white woman, when there are plenty of talented black actresses that have a harder time getting work and would've looked more like Jordan's sister), but the inevitable, often-racist shitstorm that comes with changing the race of 1960's characters for film is usually entertaining (if depressing) to watch. Especially when it's related to the Fantastic Four, a book that has struggled to be interesting and relevant ever since Jack Kirby left the book, barring a few standout periods (such as Byrne's run and the Waid/Weiringo stuff).