Call of Duty: Modern Warfare 3 Zombies has been a big hit for Treyarch, and given that success, many are optimistic about the future. While a lack of solo-friendly content has been a major complaint from fans, as has Mercenary-focused additions like Warlords and some strange balancing choices, the core gameplay is strong. So long as Treyarch continues to introduce some fresh story content and gameplay features, like new CoD Zombies mini-bosses, the mode could thrive for the entire year. However, smaller content updates should not be forgotten amid the big changes.