This year’s annual Call of Duty release–Call Of Duty: Modern Warfare 4–is set to arrive in just a few months. But according to a new report, Modern Warfare 4 may give players the chance to start the campaign during an early-access release period. Well-known CoD leak and news site CharlieIntel shared a screenshot of a “Campaign Early Access” pass on Xbox, which appears to be one of several packs available for installation. However, there’s no mention of that pass on…