[Update] Phil Spencer has since clarified on Twitter, saying that he was just kidding.
"I was joking, he said to humor him," he explained, adding, "I like Sakaguchi-san, doing BD and LO was really great. Apologies again if I created anticipation. I haven’t talked MW in awhile."
[Original] Hironobu Sakaguchi, the "father" of the Final Fantasy series and head of JRPG developer Mistwalker, may very well be making a new title for Xbox One.
The following Twitter conversation between a fan and Microsoft's Phil Spencer leads us to believe we may hear about it as early as next week.