I want Imperium Galactica 3
I would love, and kill, or mod, if I could get this done. IG 1 is up to day, my most favourite game of all times. If there would be a game engine, that allows everything, I would start modding right away. Closest is "SW Empire at War", but it's too limited in building placement 
I've played IG2, and will most likely get 1 should I find it somewhere. I haven't seen anything that would resemble Imperium Galactica in complexity while remaining real-time.
As for Nexus, it seemed to me that it was made on a very reduced budget, it felt a bit like an indie game. Story progressed way too quickly, especially the first act. Angelwing seemed like something that should appear about halfway through the game, not in the beginning. Also, the war with the Gorg ended very quickly, and Mechanoids went from an unstoppable threat to a pushover in literally two missions. Also, the map clearly seemed like it was made for an RTS game of much bigger proportions.