1. We have Clones (Automatons and Cyborgs), but I would like to see maybe another Clone variation similar to a Marine with Amphibious Assault. Maybe a Replicant, I dunno (which is basically a manufactured human being like in the movie Blade Runner).
2. Androids. A whole new Unit Category perhaps. Start with Battle Droids, cheap to make (kinda like Star Wars) and something more advanced that can take down air similar to the Cyborg (maybe call 'em Terminators like in the Terminator movies.)
3. In the Helicopter category, add Assault Drones, that may be cheaper than the regular gunship.
4. In the Air Unit category, add Fighter Drones, that are cheaper than a Fighter Jet.
5. Under the Assault Mech category, add a weaker, cheaper version with no limit to how many you can produce.
Just some ideas. Not sure if there's anything out there like these.
(Note: I would like these to be like plug n play so i can just insert them into my Next War Mod)