https://www.pcgamer.com/treyarch-confirms-black-ops-4-blackouts-next-limited-time-mode/

Following a leak through Call of Duty's companion app, Treyarch has confirmed that 'Ambush' is the next limited time mode coming to Black Ops 4's Blackout.

The leak was apparently spotted on the Call of Duty companion app and captured by Reddit user carkeys11 and posted to Reddit. According to the screenshot, Ambush will only give players the choice of sniper rifles and melee weapons, meaning the Skulker and Dead Silence perks will be 'a lot more valuable.' Outlander will come into its own too because apparently, 'once the circle starts collapsing, it never stops.' Yikes!