#12 - Bullet Club
The Bullet Club has made a remarkable impact on professional wrestling in such little time.
For the last four years, The Bullet Club has consistently been one of the hottest acts in wrestling, possessing a "cool factor" that hasn't been seen since the nWo. To be fair, they did borrow a lot of the nWo's mannerisms (such as the "Too Sweet" gesture), but they managed to re-define them and claim them as their own. Though many members have come and gone, the Club has maintained their dominance across several promotions.
Oh, and their shirt is everywhere.
Seriously, you'd be hard-pressed to find a wrestling fan who doesn't own a Bullet Club shirt. In fact, at the next wrestling event, you go to, I promise that you will see more than one person wearing a Bullet Club shirt. Their merch is making Hot Topic tons of money right now, not only because they're the most recognizable stable in wrestling today, but because...well, the shirt is really cool looking.
It's not too comprehensive or flashy, but it doesn't have to be. It's instantly distinguishable and effectively underlines what the stable is all about - they're a gang of hard-hitting bad boys, and even a non-wrestling fan could draw that conclusion upon looking at it.
Oh, and little fun fact - I'm actually wearing a Bullet Club shirt as I type this.