The Forbidden Door wrestling event took place at London's O2 Arena, featuring a series of high-profile matches between New Japan Pro-Wrestling (NJPW) and All Elite Wrestling (AEW) stars. The main event was a Lights Out Steel Cage Match marking Hiroshi Tanahashi's final UK bout, where he teamed with Jon Moxley, Claudio Castagnoli, and KUSHIDA against Jeff Allin, Will Ospreay, Hiroshi Tanahashi, Kenny Omega, and Kota Ibushi. Zack Sabre Jr. successfully defended the IWGP World Heavyweight Championship against Nigel McGuinness in a highly anticipated UK dream match. Kyle Fletcher retained the TNT Championship by defeating Hiromu Takahashi, while The Opps held onto the AEW World Trios Titles against the Bullet Club War Dogs. The event opened with a tag match featuring Yuya Uemura, El Desperado, and Paragon versus Don Callis Family and CRU. Following Forbidden Door, NJPW announced upcoming events including Blue Justice XVI on September 7, which will feature the final singles match between Yuji Nagata and Hiroshi Tanahashi, Road to Destruction on September 13 at Korakuen Hall with the NEVER 6-Man Tag titles on the line, and Destruction in Kobe on September 28 where Zack Sabre Jr. will defend the IWGP World Heavyweight Championship against Ren Narita. G1 Climax 35 winner Konosuke Takeshita is also set to challenge for the IWGP World Heavyweight Title at King of Pro Wrestling. Tickets for these events are available worldwide with English commentary via NJPW World. Additionally, exclusive Forbidden Door London merchandise is available through the NJPW Euro Store.