Are these some teasing tidbits about a possible Map Editor? Check out that last shot when our soldier pal lobs a plasma grenade towards the camera. Verrrrrrrry interesting. It's definitely a lot more robust-looking than Halo 3's Forge editor. Also, those look like new AI models of past cast members ... including Cortana. Playable models? In-game NPCs that'll be on your squad? Cats and dogs, living together? Who knows. What's for sure is that Bungie is saying "the ride isn't over yet."