Personally this would be the mod i'd most like to see from this game, a full 'renegade' style conversion mod with GDI and Nod weapons and units from the original Command and Conquer.
I remember there were some very cool style of AS maps for ut2004, one with a GDI and a Nod base at either end of the map. You started only with a barracks and no weapons, but you had 5 or so scorpions/minigun scorps. To build you base, you had to touch one of three panels in the enemies base. One for left defences, one for right defences, and the other for main base structures. This was a very cool level and idea!
I would love to work as a team with a base, where you work together to build your base/harvest tiberium and fight Nod or GDI on the battlefield with all the original units. This mod would be alot of work, but i hope theres a team out there who might consider it, or maby someone will at least make the vehicles (stealth tank would be doable now thanks to the nightshade)
EDIT: Found something already!
What do you guys think, fellow UT fans?