One aspect of the Endor ground battle that hasn't been explored in Imperial terms is the air.

I suggested having TIE Bombers thin out the forest (Apocalypse Now style) but after seeing AOTC style gunships weaving through forests in the Avatar trailer perhaps something similar would add more complexity to those scenes.

If the Tydirium was a transport ship instead of a shuttle the Rebels could have a few speeders and heavier guns which could be used to shoot them down (with the aid of some Ewok gliders and other improvised weapons).

I wonder what the Imperial version of the Republic Gunships would look like, would they be that different?