NWO is my all time favorite but, I think there are some stables that had potential and they never lived up to it.
The Main Event Mafia had alot of potential and could have been better had they been in the WWE.
You got Kurt Angle, Sting, Booker T, Scott Stenier and Kevin Nash and they did not use them right in TNA and the entrance music was annoying, they didn't give them a theme like NWO or Evolution or The 4 Horseman.
Fourtune had ALOT of potential and TNA killed it when they had Rci Flair abandon the group and join Immortal.
This is another stable that could have been better in the WWE and had the potential to be the second coming of the Four Horseman with Ric Flair playing the role of the manager instead of him wrestling.
You got AJ Styles, Robert Rude, James Storm and Kazarian, they even had Matt Morgan as the "Enforcer" like Sid Vicious was in the WCW 4 Horseman days and they blow it.
Team Angle was another stable that I think would have been one of the greatest stables had it been used right.
He had two different versions in The WWE, the first being Kurt Angle, Shelton Benjamin and Charlie Haas - the second being Kurt Angle, Mark Jindrak and Luther Reigns and he had The Angle Alliance in TNA with Kurt Angle, AJ Styles and Tyson Tomko, they only one out of those three to have success was the first one because Kurt was World Champion and Benjamin/Haas were the Tag Team Champs.
Team RECK was another stable that did not get alot of time to shine.
You have Rhyno, Edge, Christian and Kurt Angle and Edge always said that they reck of awesomeness lol.
The Straight Edge Society was another stable that did not get it's just due and I did not like the members they gave Punk. Luke Gallows was ok but, the rest was not fitting to me and I think it should have had Darren Young join when Punk was mentoring him for NXT and maybe have Curt Hawkins and Tyler Reks join, that would have been a better version of S.E.S.
The New Nexus was another group that was not used right, they had by far the best formation out of the Nexus and The New Nexus with CM Punk as leader, Michael McGillicutty, Husky Harris, David Otunga and Mason Ryan could have been a great stable.
I hope the next stable lasts longer then 6 months, they do not last these days and I hope that we get a Heel stable and a Face stable so that we can have the feuds like the good old days, not the heel stable version face stars coming together just for one or two PPVs.