I said before that I the map should be in an adjacent lake to the one you see in Delta Halo and Regret. I thought it would be cool if you take a page out of Halo 3's book and have the flagship model coming out of the clouds, which would indicate that it is the same ship as the one in the Halo 2 Delta Halo/Regret sky, but you're just closer to it. Also, you would be able to use a much lower-poly model since it would be so far away and half would be covered, so that's 1/2 the polygons right there.

Check out the level Coastal Highway from ODST when the assault carrier starts coming out of the clouds.

Also, make it look good. Shouldn't it be purple?