what sequence will i start playing as conor?

Three I think.

thats when the game gets good

this.

The first downloadable content for Assassin’s Creed III, known as The Hidden Secrets Pack, is now available for download by Season Pass holders on the Xbox 360, Playstation 3, and PC. The content will be available to everyone else excluding Wii U owners on December 11. Ubisoft says that the pack will be released on the Wii U at an undisclosed later date.

The Hidden Secrets Pack adds three new missions, the Lost Mayan Ruins, the Ghost of War, and a Dangerous secret. Players will get about an hour of additional gameplay out of the new missions according to Ubisoft, and will be rewarded with new weapons, two new single player costumes, and two additional multiplayer characters.

WHAT!!!

All of the AC series have been epic...I loved them ALL!

The next entry in the Assassin’s Creed series may take place in Brazil. In an interview with Portugese site Techtudo (as translated by Gamespot), Ubisoft Brazil managing director Bertrand Chaverot revealed that the next game will take place at least partially in the South American country, though no other context was provided.

Not really much they can do with that unless they do it modern day.