Marvel has the rights to its version of Dracula, and they're conducting a big push of late to build him up to be one of their major, major supervillains ... to rival the likes of Dr. Doom and Magneto.
Evidently, the most competent and dangerous Earth-based villains have learned the lesson that it's smart to work with the heroes as and when it suits their interests. And the heroes are prepared to employ the power and brilliance that these guys can offer.
Interestingly, Dracula seems set to play the role of anti-hero as well - if I understand this correctly, the Hulk is going to run amok in one sub-component of Marvel's "Fear Itself" mega-event that's just cranking up, and only Dracula is going to be in the right place at the right time to do something about it.
You can work out for yourself what all this means for our contemporary concepts of heroism and villainy.