Campaign development is in partnership with Infinity Ward. Sledgehammer is also "working closely" with Treyarch on Zombies.
The Steam page lists Infinity Ward, Sledgehammer Games, Beenox, Raven Software, High Moon Studios, Demonware and Treyarch.
Announced last year, the mobile battle royale shooter seems to have been delayed into November, based on its updated App Store page.
The mobile battle royale will be at the Call of Duty: Next showcase, along with Call of Duty: Modern Warfare 2 and Warzone 2.0.
Currently codenamed Project Aurora, the mobile battle royale title was confirmed to be in development less than a month ago.
The title, which seems to be the Call of Duty: Warzone for mobile, currently has a limited number of participants for this phase of testing.
Activision is hiring as it ramps up the mobile title's development, with various internal studios involved, including Solid State Studios, Beenox, Demonware, and Digital Legends.
