Halo 4 lead multiplayer map designer Kynan Pearson takes us on a tour of the "Vortex" map (Halo 4, Xbox 360)
This one isn't too bad and I like the darker feel it has to it. I'm sure there is a similar campaign level that inspired this map in particular.
I'm pretty excited about the maps for the game, but I feel that the DLC maps will probably be better.