Sports writer Bill Simmons coined the phrase "The Tyson Zone," the status a celebrity achieves when no anecdote is bizarre enough to shock you.  (e.g., Mike Tyson got a giant tattoo on his face? ... Makes sense.)  Nobody can top Tyson in this field -- this combined with his surprisingly adept comic timing made Tyson the perfect cameo for The Hangover.  Mel Gibson ranks pretty high in the Tyson Zone, and so made sense as the would be cameo in The Hangover Part II before that plan was abandoned.  It will be fun to see Liam Neeson as a tattoo artist in Thailand, but it's suddenly a very different joke.  Neeson only plays crazy.The Hangover Part II is done filming, but there is time between now and the May 26 release to add a cameo that revels in the Tyson Zone: namely, Charlie Sheen.  Details after the jump.UPDATE: Steve here. After this story was posted I contacted Todd Phillips. He told me this is "100% untrue". So anyone thinking Sheen might be in Hangover 2, let's put this rumor to bed right now. The original story is still after the jump.Simmons followed up on the Tyson Zone last month because, after all, Tyson appears to be a reformed crazy person, years removed from his wild days.  Who is the natural successor to the throne?  Charlie Sheen.  No question.  If I woke up tomorrow to the headline "Charlie Sheen Bites Off Chuck Lorre's Ear"... makes sense.Given recent developments, Badass Digest hears that director Todd Phillips can't help but recruit Sheen for a cameo.I don't want to judge a scene that may or may not happen in a movie that comes out months from now.  But we were laughing with Tyson in the first Hangover, right?  He was in on the joke?  Sheen doesn't have that self awareness.  It taps into the same wild persona, but because we're at a different stage of the Sheen mess -- in the thick of it -- it's yet another very different joke.  Maybe that's what you need for a sequel.  But if you're willing to settle for a different joke, maybe it's preferable (and hell, more ethical) to leave it at Neeson playing crazy.That said, Phillips knows his movie -- and comedy in general -- much better than I do.  I expect to laugh a few dozen times, whether Sheen appears or not.Here is the production information for The Hangover Part II:

Director: Todd Phillips

Writers: Scot Armstrong, Todd Phillips, Craig Mazin

Producers: Todd Phillips, Dan Goldberg

Executive Producers: Thomas Tull, Jon Jashni, William Fay, Scott Budnick, Chris Bender, J.C. Spink

Cast: Bradley Cooper, Ed Helms, Zach Galifianakis, Jeffrey Tambor, Mike Tyson, Justin Bartha, Ken Jeong

Comedy. In the follow-up to the record-breaking hit comedy “The Hangover,” Phil (Bradley Cooper), Stu (Ed Helms), Alan (Zach Galifianakis) and Doug (Justin Bartha) travel to exotic Thailand for Stu’s wedding. After the unforgettable bachelor party in Las Vegas, Stu is taking no chances and has opted for a safe, subdued pre-wedding brunch. However, things don’t always go as planned. What happens in Vegas may stay in Vegas, but what happens in Bangkok can’t even be imagined.