That will only happen if it brings at least 100 million in revenue for xbox, For as great a game as ff16 is, It will hardly result in 10k new subscribers on gamepass let alone a number that justifies a 100 million investment.
The problem for xbox is they are never going to get new subscribers at a rate that justifies such huge investments on 3rd party IP and if the don't get AAA 3rd party games on gamepass they risk alienating a) the existing subscribers who want those games on the service and b) encourage this absurd behaviour of not buying games and waiting for if and when the games hit gamepass. Gamepass has been the pandora's box for xbox.
Precisely.
It's exactly why they're in the mess they're in. They made an irreversible bet that the growth arrow would keep pointing up, then it went in the worst possible direction for their business.