“I came across this at a very sad point in my life, it was on a hard drive on a vintage computer I bought off Amazon,” Marshall explains on the expansion’s GitHub page. “Literally this essentially saved my life, I was going through a divorce and just happen[ing] to come across something like this was insane.”
I think you are confused. I am simply saying, the developers, the individuals, who designed and created the previous games are not at the studio who owns the IP. Unless they are all rehired at Firaxis Games, the individuals cannot develop another XCOM. Do you understand now?