I've got a few projects in the works:
• Embark - A re-imagination of my map Embarcadero from Reach. 6 v 6 to 8 v 8, asymmetric, very urban with 4 main buildings and driving paths between, as well as a lot of hills and height bumps. I've been testing for quite some time now, I think 1 flag and Slayer are playing pretty solidly, mostly trying to make more flag routes viable and get extraction playing strongly.
• Excavation - Name is temporary for now. Another 6 v 6 map, this time inversely symmetric with 2 bases, a hilly outer circuit, a large central cave that can be used by vehicles, and a few smaller central rooms connected to it. Tested a little for flag and slayer, though it was designed for CTF and Extraction. Seems to be going well, balance between Rocket Hogs, Laser, and Mantis's is interesting.
• A Puzzle Map - No name as of now. I've been working on this since a year into Reach, rebuilt what I had in 4 and added a second room. Based on disorienting the player and being easy to do but difficult to understand. I'm not using any of the normal Halo glitches in this puzzle, it's all about thinking outside the box. Hopefully I'll get the final room figured out someday, the first 2 are golden right now.