First, let's take a look at the timeframe of the event. Modern Warfare 2 and Warzone players will be able to jump into The Haunting right now, because it started on 17th October 2024. However, the event ends on 6th November 2024. Plenty of time, but make sure you don't miss out!

ZOMBIE GHOST - the Creepiest Operator skin ever in COD: MODERN WARFARE 2 (MWIII Pre-purchase Reward) - YouTube.