Nothing really changed in my thoughts, except for this:
(Imagine the Council spoke person) Project XCOM wasn't able to completely destroy the alien threat. They had breached into Earth's government and brainwashed them to submit to their alien overlords. Commander, we need you to bring back the XCOM project....and start up our....Retaliation.
What this is; is pretty cool. I had this idea of a bipedal Viper http://xcom.wikia.com/wiki/Viper_(XCOM_2) that defected from the Alien armada and joined XCOM. The soldiers called him Raptor as an nickname, since his name was somewhat hard to pronounced: Tsylhalasth (Sill-a-lith). Also Dino-human hybrids.
Well...I guess this XCOM idea is open for RPs.