5 Superstars who formed their first stables outside of WWE 

#1 Finn Bálor - The Bullet Club in NJPW

Where it all started (Pic Source: NJPW)

Heir to the legacy of the original nWo, this heel faction was formed by WWE's Finn Bálor, known as Prince Devitt at the time. The Bullet Club originally comprised of gaijin or foreigners.

Aside from Devitt, the original members of the group were Karl Anderson, Bad Luck Fale, and Toma Tonga. Since 2013, the group has flourished in NJPW and attracted some of the best talents including AJ Styles, Doc (Luke) Gallows, Hangman Page, Jeff Jarrett, The Young Bucks, Kenny Omega, Cody Rhodes, Cody Hall, and Adam Cole.

In WWE, The Club was seemingly reformed with AJ Styles, Anderson, and Gallows. It was eventually re-dubbed The Original Club a.k.a. The O.C., but of course, it didn't last long due to Anderson and Gallows' releases.

But there is no doubting the impact that the Bullet Club has had on the world of professional wrestling (NJPW, WWE, ROH, etc.). In 2020, the group is still thriving and it'll be interesting to see where things go.