Has forge been confirmed in this game? Foundry(Halo 3) and Forge World(Halo: Reach) are easily my favorite maps in the Halo series mainly because you can use your creativity and imagination to construct very fun maps for various game types. Really hope we get another map to completely build our own maps from practically nothing.
Wake up ballin man, go to sleep stuntin man. -Gucci mane
This is the one thing I can complement Reach on expanding, forge world was largely a great addition, but the repetative nature of the maps you could make limited creativity. Add Desert, Arctic, Swamp, Forest, Human Building, and Covy Ship pallet swaps and then we're talking.