In one of the most memorable moments at AEW x NJPW Forbidden Door, the crowd erupted as the debuting Claudio Castagnoli (f.k.a. Cesaro in WWE) emerged from the tunnel to face Zack Sabre Jr.Castagnoli was revealed as the replacement for Bryan Danielson. The American Dragon was the original opponent of Sabre Jr., but he is currently nursing an injury. Danielson then picked someone to fill in for him, and the mystery man turned out to be Claudio.Several AEW stars have reacted to Castagnoli's stunning AEW debut, and even his former WWE colleague Xavier Woods seemingly joined in.Austin Creed@AustinCreedWinsLETS GOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO85701005LETS GOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOFormer RAW Women's Champion Becky Lynch posted a photo of the fan-favorite to react to his AEW debut.The Man@BeckyLynchWWE4619721https://t.co/uxORRbuRHBMeanwhile, Britt Baker also gave her reaction, saying it must have been her partner Adam Cole's shoes that brought him to the company.Dr. Britt Baker, D.M.D.@RealBrittBakerCLAUDIO#ForbiddenDoor @AdamColePro’s Uno shoes must have summoned him.3419246CLAUDIO🇨🇭#ForbiddenDoor @AdamColePro’s Uno shoes must have summoned him.Claudio's former WWE colleague Ruby Soho (former Ruby Riott) also expressed her excitement.Ruby Soho@realrubysohoCLAUDIO!!!!!!!!! twitter.com/aew/status/154…All Elite Wrestling@AEW#ZSJ's opponent is none other than Claudio Castagnoli @ClaudioCSRO, the newest member of the #BlackpoolCombatClub, here at #ForbiddenDoor! Order the PPV right now! #AEWxNJPW109983#ZSJ's opponent is none other than Claudio Castagnoli @ClaudioCSRO, the newest member of the #BlackpoolCombatClub, here at #ForbiddenDoor! Order the PPV right now! #AEWxNJPW https://t.co/uZdC9x5eFGCLAUDIO!!!!!!!!! 🇨🇭 twitter.com/aew/status/154…Lee Moriarty thought the former Cesaro in AEW will be "money."🐯 TAIGASTYLE@theleemoriartyCashmoney Claudio31428Cashmoney ClaudioMeanwhile, Brodie Lee's wife, Amanda Huber, couldn't help but be proud of the former WWE Superstar while also saying that he's one of her favorites.Amanda@MandaLHuberMy guy is here @ClaudioCSRO One of my all time favorite people 🥰55950My guy is here 😭😭😭@ClaudioCSRO One of my all time favorite people 🥰 https://t.co/JpQzFRV2tKReferee Aubrey Edwards reacted by tweeting about how she is mimicking Claudio's arm cannon motion, his signature mannerism from his Cesaro days in WWE.Aubrey Edwards 💖💜💙@RefAubrey*furiously does the arm cannon motion* #ForbiddenDoor25217*furiously does the arm cannon motion* #ForbiddenDoorDark Order's John Silver thought Castagnoli might be his father.John Silver@SilverNumber1Dad??? twitter.com/aew/status/154…All Elite Wrestling@AEW#ZSJ's opponent is none other than Claudio Castagnoli @ClaudioCSRO, the newest member of the #BlackpoolCombatClub, here at #ForbiddenDoor! Order the PPV right now! #AEWxNJPW1441159#ZSJ's opponent is none other than Claudio Castagnoli @ClaudioCSRO, the newest member of the #BlackpoolCombatClub, here at #ForbiddenDoor! Order the PPV right now! #AEWxNJPW https://t.co/uZdC9x5eFGDad??? twitter.com/aew/status/154…Meanwhile, Renee Paquette was all fired up about Claudio's debut at Forbidden Door.Renee Paquette@ReneePaquetteClaudioclaudioclaudioaudioeveryonesfuckeditsclaudio!!!!!🏻🏻🏻🏻2413208Claudioclaudioclaudioaudioeveryonesfuckeditsclaudio!!!!!🙌🏻🙌🏻🙌🏻🙌🏻Lastly, Sammy Guevara made it clear that he can't wait to get his hands on the debuting star.sammy guevara@sammyguevaraI can’t wait to beat up Claudio!24115I can’t wait to beat up Claudio!With his debut, Castagnoli is now a member of the Blackpool Combat Club, so he will team up with the group to face the Jericho Appreciation Society in the Blood and Guts Match.