User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-4999424-20130308062357/@comment-4999424-20130308150040

From GameInformer:

The website CVG has published an image of a logo for a previously unknown project entitled Assassin's Creed: Rising Phoenix.

CVG got the image from the blog AllGamesBeta. It appears to be an internal Ubisoft image created by the company's Ubisoft Digital Arts division - which was created to guide the company's digital movie and cross-media projects. Due to the Digital Arts stamp on the image, CVG speculates that this might be an Assassin's Creed CG film project. However, with no official confirmation as yet, we'll just have to wait and see if this is real.

Source: AllGamesBeta via CVG