#11 Aces and Eights
This was a great faction storyline. TNA took their time and this was going so well until it suddenly crumbled apart out of nowhere. It started with a group of masked bikers that would attack people and cause havoc. No one knew who they were or what they wanted.
For months TNA shows became a host to inquisitions as to their identities, but the reveal was slow. One by one members were revealed including Devon Dudley, Garett Bischoff, Knux (Mike Knox), Taz, D'Lo Brown, Doc (Luke Gallows), Mr. Anderson, and Wes Brisco. At its height, Aces and Eights spoiled Brooke Hogan's wedding to Bully Ray only to later reveal that Bully Ray was, in fact, their leader.
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Honestly, though that was when things started to go poorly. As soon as he was revealed tensions skyrocketed in the group, leading to him basically kicking everyone out except for his new Girlfriend Brooke Tessmacher and Bellator fighter Tito Ortiz (who was pulled out by Bellator within a month). At their best, they felt very primal and brutal, at their worst they were like a bunch of kids pretending to be a motorcycle gang in a clubhouse.