We know Atlas are Team Spacey but there's been no mention yet of the Sentinels. This tweet from Sledgehammer Games co-founder of Michael Condrey also confirms a return for good ol' Capture The Flag.
It looks like the studio's been letting a few community people play the game already, in this case former COD-pro Will “BigTymer” Johnson.
Here's the Tweet:
— Michael Condrey (@MichaelCondrey) June 21, 2014