User blog comment:Master Sima Yi/Assassinews 04-06-'12 — E3 hub/@comment-5216016-20120628084932

Not sure if you know this yet but I saw yet another pre-order bonus:

http://www.ultima.pl/data/pliki/ulcac.jpg

This means the captain outfit is exclusive to those sea missions just like some of Ezio's guard outfits.