User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-5638823-20130307080352/@comment-4868246-20130307170556

I do not posses solid info, but I heard in a recent interview that it's almost the size of all AC3 maps together. Regardless, I became instantly excited when I heard how the map structuring is going to be, and I love how they're attempting to break the stale norms of previous ACs, instead of the typical multiple maps, you have an enormous sea with 50 islands and 3 major cities (Havana really excited me because it's restoring the verticality and connected rooftops Venice enjoyed) :D

Plus, Venice is my favorite city in the entire franchise!