surgery, which was expected to sideline him for seven to nine months. He returned on 14 September. TM-61 then entered the 2018 Dusty Rhodes Tag Team Classic, being eliminated by the Authors of Pain in the first round. The team was officially renamed The Mighty on the 6 June episode of NXT. On December 14, Miller requested and was granted his release from WWE. According to the Wrestling Observer Newsletter, Miller asked for his release in order to spend more time with his family in Australia. New Japan Pro-Wrestling (2019–present) On February 24, 2019, it was announced that Nicholls would be returning to New Japan Pro-Wrestling (NJPW), and would be competing in the 2019 New Japan Cup. Chaos' Rocky Romero subsequently revealed him as the newest member of the stable. He would defeat Hikuleo in the first round, but would be eliminated by stablemate Kazuchika Okada in the second round. After his elimination, Nicholls participated in six-man matches, usually alongside Juice Robinson, and then later with his fellow Chaos stablemates. On the Road To Wrestling Dontaku tour, Nicholls often partnered Hirooki Goto or Toru Yano in multi-man matches involving Bullet Club. At Wrestling Dontaku 2019, Nicholls was on the winning side of both eight-man matches. On the Kizuna Road tour, Nicholls kept teaming with Robinson, as well as with his Chaos stablemates, continuing their feud with Bullet Club. Towards the end, Nicholls challenged the Guerrillas of Destiny (Tama Tonga and Tanga Loa) for the IWGP Tag Team Championship, and he and Robinson defeated G.O.D. on the final day of the tour to establish them as credible contenders. However, on night one of Southern Showdown, Nicholls and Robinson were defeated by G.O.D. On night two, Nicholls teamed with Yano and Robinson, as they defeated the Bullet Club trio of Tonga, Loa and Gino Gambino; this marked the last time he would be alongside other Chaos stablemates. Nicholls then appeared on the Fighting Spirit Unleashed tour in the United States, and went unbeaten, mostly facing opponents from the L.A. Dojo. On November 6, it was announced that Nicholls would be competing in the 2019 World Tag League, alongside Jeff Cobb. Nicholls would go on to state that Cobb was an upgrade on Robinson. Nicholls and Cobb finished the tournament in ninth place with sixteen points, ten behind Robinson and David Finlay. In 2020 and 2021, Nicholls was unable to enter Japan due