There aren't many video game series where I care more about the multiplayer than the main campaign, but Halo is one of them, and that's partly because I love Halo multi, but also because I'm pretty engaged with the Halo competitive scene. This video shows off multiple new features destined for Halo 4, including promothean vision, and it's played by one of the best Halo pros to ever pick up a controller, Neighbour.
I'm expecting plenty of you won't really like the commentary, but I actually enjoyed it, particularly because it provides some interesting info on how the spawn system may or may not work.
It looks as though 343 is really going for it with multiplayer this time round. Its really attempting to redefine a lot of the key aspects of Halo as a game, which worries me, but also excites me. Can't wait to get hands on with it.