Warzone 2.0 pre-load showing up in Modern Warfare 2 on Steam

Many Modern Warfare 2 players are confused as Warzone 2.0 pre-load is already showing up for them as 24B file on Steam.

I thought Warzone 2.0 was its own game? [Steam] : r/CODWarzone

How to Pre Download Warzone 2? – Warzone 2.0 Guide

Warzone 2.0 release time: US, UK, and EU time zones

Play Modern Warfare II on PC today! Here's how to access the COD: MW2 campaign early

Warzone 2 release date, UK launch time, roadmap and map news

Activision Blizzard drops Warzone 2 trailer as pre-loading begins - Xfire

Modern Warfare 2 campaign preload, full specs revealed

How to preload Warzone 2 on PlayStation, Xbox and PC

How to unlock the M13B assault rifle in Warzone 2 and Modern Warfare 2