Today Ubisoft formally announced the Assassin's Creed 3 Season Pass for the game's downloadable content. They also went one step further and announced "The Tyranny Of King Washington," a portion of the DLC that will be released for the game post-launch.
"King Washington" is a new single-player campaign that will be released over three DLC packs. It centers around an alternate history of the American Revolution. In this new timeline, George Washington decides to become king of the American colonies instead of establishing a democracy. It's up to Connor to overthrow this new dictator.
The Season Pass will give PC/PS3/Xbox 360 players access to five DLC packs in total. The other two add-ons will presumably be related to multiplayer. Ubisoft says that they have new characters and maps planned for online play.
GameStop and Best Buy are now accepting pre-orders of the Season Pass. You can also buy it directly through Xbox Live or PSN for $29.99 when the game launches. It's said to be 25% cheaper than buying all of the DLC individually.
Ubisoft states that the Season Pass DLC will arrive within six months of the game's launch. Furthermore, Season Pass owners will get their hands on the first DLC a week before everyone else.
There's no mention of a Season Pass for the Wii U versions of AC3. Ubisoft merely states that all of the game's DLC will be available for that console as well.