Will the upcoming "Hangover Part III" be the Wolf Pack's last adventure together?

Warner Bros. recently announced that the third film in the series is set to be released May 24, 2013, and it's been reported earlier that it will ditch the previous films' morning-after-mystery premise. It will reunite Bradley Cooper, Zach Galifianakis, Ed Helms -- who will all be getting a significant bump in salary for the threequel.

The real surprise is that "Part III" will allegedly be the last film in the extremely lucrative series. The press release with the opening date includes Phillips claiming, "It will be a fitting conclusion to our three-part opera of mayhem, despair, and bad decisions."

But if "Part III" earns as much as "Part II" (nearly $600 million dollars worldwide), can Warner Bros. resist the temptation to -- somehow -- order a fourth? It would be fairly easy to replace any of the actors who didn't want to return, and the title and formula themselves can easily be applied to an infinite variety of characters and situations. Do audiences want more?