I wish I had an answer for that, but as it is, sadly, Vampire Knight is ending, and is scheduled to finish its final arc this May. This after a nine year run, is a pretty good stretch for the vampire romance.
Of course, now this means that I have to cram the living hell out of the rest of the manga, so I can be something like caught up. Me and my back-log of things to watch and read.
Anyway, I'm looking forward to seeing what Matsuri Hino has up her sleeves for the next manga series.