Here are our Easter Eggs for Assassin's Creed IV: Black Flag on Wii U. The most trustworthy items get the most 'thumbs up' from our users and appear nearer the top!
While you're inside the Atocha shipwreck, look outside to see a giant squid fighting a whale.
When you hack the Abstergo computers, you can find a message from the Blume Corporation about CtOS. Blume and CtOS are both from Ubisoft's Watch Dogs, which was still in development at that point.