If moviegoers aren't sending Hollywood a message with their $$$ that "we want you guys to take risks," then why should they take risks? They'd be perfectly justified just doing nothing but sequels and movies based on comic books and sequels of movies based on comic books from here on out.
Come on, now, how much of a "risk" is a vampire movie, produced by Tim Burton, based on a best-selling novel?
As for "originality," it's basicially a remake of "Blade," with Abe Lincoln in the lead.
The simple fact of the matter is that this movie isn't doing well in large part because it's getting bad reviews
and bad word of mouth
, not because it's too "original" or "risky."