Good news, everyone!
Enslaved hits on the fif, while Vanquish is two weeks later on the 19. Even worse news: Enslaved hits the same day as classic-gameplay inspired Final Fantasy: The 4 Heroes of Light for the DS.
It's not that big of a deal, because what's the chance of a gamer with just a 360 or PS3 having a DS? Not so much for you, but for this guy, I'm screwed.