4. Former AEW TNT champion, Miro, is also a FCW alumni
AEW's 'The Redeemer' developed his wrestling persona and trained within FCW before moving into NXT. Unfortunately for Miro, a miltitude of injuries held him back from wrestling too often in FCW before it became NXT.
Miro was signed to WWE in September 2010, and was assigned to FCW. At first he went by the ring name, Alexander Rusev. He would wrestle off of television for months, and he would eventually have his first televised match on July 17th, 2011. Not too long after debuting, Miro would pick up multiple injuries and spend six months recovering.
Miro returned to FCW nearly a year later with a new manager. This return was interrupted when Rusev suffered a broken neck, temporarily paralyzing his arm. This injury has been referenced in AEW with his Redeemer persona. During his rehabilitation, he traveled to Thailand and learned Muay Thai, which would be heavily used by his Rusev persona from then on.
Before making his final return, FCW would be rebranded as the NXT we know today. After his neck injury healed, Miro would debut as Rusev on NXT television, competing in a battle royal.
He would have dominating runs and even the odd team up with Dax Harwood. It would be some time before WWE teamed Miro up with Lana, creating a duo many fans loved to hate.
3. Ruby Soho was trained by the WWE Performance Center
Before debuting as Ruby Soho in AEW, this talented grappler went by the name Ruby Riott in WWE. Although the punk-rock inspired wrestler has been wrestling since 2010, she did some training in the WWE Performance Center shortly before debuting on NXT.
Soho would travel the world, beginning in the Independent Circuit and making her way through to Japan. Before going abroad, Soho had a lengthy run in OVW (Ohio Valley Wrestling). While here she would gain further experience, even picking up the OVW Women's Championship. After this period, Soho would take her journey abroad, wrestling in Chikara and World Wonder Ring Stardom. In Japan, Soho would learn from the Japanese wrestlers. Incorporating their daredevil style for the character she'd go on to display in WWE and now AEW.
On December 15, 2016 Soho would begin training at the WWE Performance Center. One month later, Soho would make her debut in WWE NXT as Ruby Riot - notably without the second "t" in her name.
This would begin her interesting yet disappointing run in WWE. Since her debut in AEW, Soho has shown a lot of progress and could establish herself as a legitimate contender.