Blade isnt a black movie or even a black comic. Its a vampire comic where the protagonist is black. The Black Panther would be a black story. You think soccer moms are gonna take lil Timmy to see a movie about black people shytting on white folks? Aint no way in hell Marvel is gonna put Iron Man and Captain America getting shown up on film, especially by an unpopular black hero.
I could see if there was a record of people actually clamoring for Black Panther material but even nikkas dont read his books. I guarantee more black people know the history of Iron Man, Captain America, The Hulk, etc...over the Black Panther.
You are assuming alot of shyt and most of it is just not correct. Red Tails was a movie with a majority black cast and it did ok not great but I don't think a white counterpart of that movie would of did much better.
A black panther movie can do well, the history of the movie doesn't mean shyt because most ordinary non comic book people didn't know about thor either. It all depends on how the story is portrayed and how it's marketed, if a studio does a black panther movie and they come out with a hot trailer people will go see it. You are assuming just because the title has black panther in it, it automatically makes it controversial that's simply not true.
Ironically your line of thinking is probably more in line with what an ignorant white producers who would fund a black panther movie is thinking. They don't think that it will sell well to white america when that is just not true. As long as the movie's plotline is not offensive, the story is actually interesting, and the action is exciting people will go see it in my opinon.