AC III DLC: Black Flag?

A conversation overheard in a cafe in San Francisco has sparked speculation regarding yet-to-be announced DLC for Assassin's Creed III.

We already know about The Tyranny of King Washington, the first part of which will be with us later this month, but this rumour outlines a new DLC package with a different setting.

The following information was posted on Reddit:

"Whilst sitting in a San Francisco Cafe, I happened to overhear two advertising designers discussing a new piece of ACIII DLC, titled Black Flag, that will focus more deeply on naval combat. According to them, the tagline stands as "Survival is the Only Thing Worth Dying For," and the commercial being pitched involves an Admiral of the British Royal Navy attempting to arrest Connor Kenway on the high seas, whilst a Johnny Cash song sets the tone. The DLC is apparently nearly six months out and still in early development, but seems to be a definite project that Ubisoft is working on."

Nothing has been confirmed by Ubisoft, and the DLC Season Pass content can all be accounted for, meaning that this has to be put down as pure rumour, for now. But Assassin's Creed with pirates? That's sure to pique a lot of people's interest.