During the latest edition of Legends Roundtable on WWE 24/7 featuring Ric Flair, Mick Foley, Tazz, and Jim Ross, they talked about factions in professional wrestling.
Foley brought up how his "Union" faction from back in 1999 (featuring Vince McMahon, Big Show, Test, and Ken Shamrock) didn't work out too well. Foley said he can't use about five different variations of the term "Union" for legal reasons if he ever left WWE, which he found funny.
He also said WWE owns the the rights to "Mankind," but he owns "Cactus Jack"—the persona he portrayed for a number of years before joining WWE. Considering that Foley owns the name, it opens up the opportunity for "Cactus Jack" to appear in TNA if they ever decide to go that route.