The ecosystem support doesn't end with the XSeries; the interest in receiving a larger catalog of games goes beyond that... including the upcoming new XBOX "console"
Here we have the same person seeking to be the center of attention once again. A few months ago, he was positioning himself to return to work for Xbox...
Then, on the question of near-future support:
1- Instead of looking a very concrete layoff, you can also look at the latest and recent movements and new job offers aimed at expanding and increasing agreements and collaborations with third parties. Those say something different than what you're implying.
2- We've been having the same reactions for 2-3 years every time a studio or game (counted on one hand) questions or casts doubt on the release of an XBOX version. It turns out that in ALL cases, that Xbox version ends up being released.
3-When this game is released we may be in year 7 of the generation... and who knows if the new Xbox will be on the market.