I've been following the Fantastic Four reboot for the past year, since March of 2013, and as the time went on the cast just made me sadder and sadder. Now, with Josh Trank lying and saying that he didn't choose to make Johnny black but that he chose to make MBJ Johnny, I've had it. My problem isn't that Johnny is black, it's that Sue is white. To me it seems that Fox and Trank are saying everything that Sue Storm is: pretty, smart, and married to the smartest guy in the universe, can only be a blonde woman, not a black woman. That's racist, saying that because Sue is pretty she can't be black. Maybe it's because Sue turns invisible, and it would be racist to make the character that turns invisible black, but Johnny catches himself on fire. Is it not racist that the character that sets himself on fire is black? Why isn't Reed black, Miles Teller Ben, and Jamie Bell Johnny?
Before the cast of this reboot was released, I had some intrest in the film. Once May of 2013 hit, and all the rumors of the cast started appearing, I began to lose intrest in the film. It has nothing to do with Johnny's race, but everything to do with Sue's. I would still have interest in the Foxtastic Four if Sue was also black, but Sue isn't black, she is white. Trank says that changing one race but keeping the other makes only a "minor" change to the two, but it doesn't. So I've given up on this reboot, I'm just going to wait for it to fail.
This article from ComicsAlliance sums up everything really good.
http://comicsalliance.com/fantastic-four-reboot-casting-analysis-commentary-jordan-mara-bell-teller-fox-movie-marvel/