I never saw the Blade films - I'm not particularly fond of the character. They did pretty well, which is good, I'm always glad to hear that a comic film did well just so that we don't start getting another Batman & Robin type of ending to comics on the big screen.
But I think they should focus on bigger projects instead of taking any character they can. Wouldn't you guys much rather see an Iron Man film than an Ant-Man one? How about Flash instead of Luke Cage? Green Lantern instead of like, Zatanna? I could even see having (one, just one) Dr. Strange film over having say...Hawkman.
Though, I'd be happier seeing a Black Panther film being marketed than a film about like, Black Widow. I'm getting really tired of the "I'm the badass chick who's got the skill to beat up any guy that comes my way" movie, and so is the general audience. Aeon Flux and Ultraviolet - we still hearing about them? If you are, you're in a tight knit circle my friend lol.
As for actually who should play Black Panther, I don't know. Definitely not Snipes though. He's not on a short list of black actors like Jamie Foxx and Denzel Washington lol. There are a lot of others. Obviously you need someone that looks the part in more than just skin color, cause you don't want Michael Clark Duncan playing Nick Fury or Rick Moranis playing Captain America, lol.