Wrestle Kingdom 21 was a professional wrestling event produced by New Japan Pro-Wrestling (NJPW), held on January 4, 2027, at the Tokyo Dome in Tokyo, Japan. The event was headlined by Yota Tsuji defending the IWGP Heavyweight Championship against Kenny Omega.
| Actor | Role |
|---|---|
 Yota TsujiYota Tsuji | Yota Tsuji |
 Tyson SmithKenny Omega | Kenny Omega |
 Gabriel McMenaminGabe Kidd | Gabe Kidd |
 Yuya UemuraYuya Uemura | Yuya Uemura |
 Ryohei OiwaRyohei Oiwa | Ryohei Oiwa |
 Maxwell Jacob FriedmanMJF | MJF |
 Yōhei KomatsuYOH | YOH |
 Sho TanakaSHO | SHO |
 Shin TakagiShingo Takagi | Shingo Takagi |
 Jonathan GoodJox Moxley | Jox Moxley |
 William OspreayWill Ospreay | Will Ospreay |
 Callum NewmanCallum Newman | Callum Newman |
 Robert BellRobbie X | Robbie X |
 Taiji IshimoriTaiji Ishimori | Taiji Ishimori |
 Luis UriveMistico | Mistico |
 Kosei FujitaKosei Fujita | Kosei Fujita |
 James McMathRobbie Eagles | Robbie Eagles |