At least, that's what the promo images suggest. While PlayXBLA lists the included Doctor as the twelfth, Xbox Wire says this pack comes with the eleventh Doctor. The Minecraft images show Capaldi, who is the twelfth Doctor, though after that messy business with the War Doctor, an incarnation of the Doctor existing between his eighth and ninth regenerations, the whole count is out of whack. We understand that the numbers thing is a little confusing.
That said, the images suggest Peter Capaldi's Doctor will appear in Minecraft Xbox 360 Edition this September, alongside Jenna Coleman and some Daleks. That's settled. This is the first of many Doctor Who skin packs, which promise to deliver "a wide selection of the best characters from the entire 50 years of Doctor Who," Microsoft says.
Update: It's 100 percent, definitely, for sure the twelfth Doctor in the first Doctor Who skin pack, Microsoft tells Joystiq. Huzzah (or whatever Capaldi's catchphrase would be)!