http://assassinscreed.au.ubi.com/4/

I love the Pirates of the Carribbian movie. This is something I would love to see. It could be a whole new consept for an openworld game; traveling around via ship. Sailing from island to island at will, instead of just singular missions has always been an idea of mine that they just might use, and treasure, there MUST be treasure!
What are your ideas and such?