Another article is saying Grounded is the 4th one, which makes a lot of sense. Also I seemed to have completely skipped over the talk that they are going to continue being hardware makers, so we'll see at least another generation of Xbox. That to me feels like they'll be much more picky about what they bring to other systems, so probably no Gears, Forza, Halo, that sort of stuff. Up in the air for other big and new titles.
All that matters right this second is Rare Replay though, put it on Switch, PS5, or PC you cowards! lol