User blog comment:Damac1214/First Image of Call of Duty 2014 Released/@comment-174.54.162.238-20140422233746/@comment-1187559-20140423080929

Well I doubt they'll be be building a whole new engine. Keep in mind it took Bethesda about 5 years to build the Creation engine to replace the Gamebryo engine, as well as make Skyrim, which needed completely new models. In a 3 year timespan, they'll have more time to modify the game engine, but they won't be making a new one. Not when they can just reuse assets.