Activision, through one of its Call of Duty studios, reportedly helps Microsoft explore development on future Halo games. Multiple outlets cite a report that the studio created an early prototype for a Halo project after Microsoft’s acquisition of Activision Blizzard, and that this prototype was later dropped.
NDTV and Metro both say Microsoft cancelled the initial prototype, while still considering outsourcing or involving the Call of Duty team in later Halo work. GameSpot adds context, reporting that Microsoft enlisted Sledgehammer Games to assist with a Halo multiplayer concept. It says work began with a prototype in June and was cancelled in July after only early gameplay elements were tested. GameSpot also notes that Microsoft has not approved a full project yet, describing the effort as still being explored rather than “greenlit.”
The outlets differ mainly in emphasis: NDTV and Metro focus on the reported pitch and Microsoft’s continued consideration; GameSpot provides additional detail on the studio involved and the timeline, and discusses broader speculation about how Halo’s development strategy may evolve. None of the reports indicate any confirmed new Halo release tied to Activision’s involvement.