Call of Duty is making major changes to how content carries forward in Warzone, starting with Modern Warfare 4’s integration into battle royale. Players will still have access to years’ worth of weapons from previous titles, but there will be limitations on how they’re used in Warzone. Operator skins and weapons from Modern Warfare 2, Modern Warfare 3, Black Ops 6, and Black Ops 7 will remain available in Warzone for Season 1, including access to the blueprints and camos…