There's an extended 4 minute version here with a bunch of additional stuff:
Man I can't wait for this. Having the other protagonists fighting alongside you during missions looks radical, Nero's stab-and-rev move from the Echidna fight in 4 coming back, and that's to say nothing of V's gameplay. Slow-paced demon summoning looks like it could be pretty rad, and there are elements of Vergil from 4SE in there like the (now mandatory) slow walking and cane teleport. Also that panther thing is a shadow from DMC1, fuck yes.
Dante going to take Cerberus for a walk is amazing too. I wonder if that means the demon weapons from past games revert to their original forms after their respective endings, or whether Dante is just talking to a set of offscreen nunchaku in that scene. I'm entertained by the idea of having to keep Cerberus as a pet in his own dungeon.
Also, that brief cut at the end looks like Dante's Perfect DT from the DMC4 concept art. Looks like they're going all-in on bridging everything together at last.
The cameo system sounds rad, the latest entry in the emerging 'lite multiplayer' genre Dark souls popularized.
I was kind of hoping for a "one more thing, campaign co-op is supported!" after seeing the other characters fight in those missions, but this is also cool. Looking forward to seeing some style beasts go to work first-hand (second-hand?) when the game's been out for a few weeks.
Also this is probably thread-worthy since it's a new feature reveal. I might post a thread up tomorrow if nobody else gets there first.