User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-24849873-20140809155616/@comment-3046679-20140809160654

Because asset reuse is cheaper than designing a whole new city, given that this game is pretty much a throwaway to those with last-gen consoles, so that they won't feel left out, and will continue buying AC games later on.