#4. PWG
Pro Wrestling Guerilla is arguably America's most popular and famous Independent promotion and throughout the years, several WWE superstars following their departure have worked for PWG. For instance, the likes of Cody Rhodes and Sami Callihan are prime examples.
Similarly, former notable PWG superstars are now currently a part of WWE's current roster. The likes of Ricochet, Aleister Black, Keith Lee, Dominick Dijakovic, Johnny Gargano, Tommaso Ciampa, Adam Cole, and Candice LeRae are all former PWG superstars and have eventually signed for WWE.
Following the same process, Dean Ambrose could also make his way over to PWG and compete in some absolute dream matches with some of the best Independent talents around the globe. Ambrose has already established his legacy as one of Indies biggest legends, thanks to his work with CZW in the past and a run with PWG will certainly be a heartwarming comeback for the man once known as Jon Moxley.