Assassin's Creed heroes don't always intentionally become Assassins, as is the case with Ezio and likely Connor as well. In the latest Assassins' Creed III "Inside" series, the developers talk a little more about the game's hero.
Connor is of British and Native American descent, and he really doesn't have too much of a personal stake in the America-Britain conflict at first. But things change, and eventually, our man of mixed backgrounds jumps in, making all this freedom business his business too. Hey, can't sit on the sidelines forever.
Of course he's every bit as capable an Assassin as his predecessors, even if his weapons are entirely unfamiliar to us.
Inside Assassin's Creed III: Episode 3 - YouTube
Assassin's Creed III will be out on October 30 for Xbox 360 and PS3, then 20 days after for PC. A Wii U version is also expected.