新日本プロレス
On the May 24, 2021 episode of , as part of the on-going relationship between All Elite Wrestling (AEW) and New Japan Pro Wrestling, Romero made his debut for the promotion defeating JD Drake. After the match, Romero briefly reunited with his former Roppongi Vice partner Beretta as he saved Romero from an attack by Ryan Nemeth, Peter Avalon and Cezar Bononi as their theme music played and they embraced in the ring.