Cooper, Galifianakis and Helms have reportedly asked for $15 million each (against the backend profit) to return to the series for what you would have to imagine is its final installment; per The Hollywood Reporter, they'll likely get their raise.
The trio earned $5 million each to return for "The Hangover Part II," while also participating in that film's lucrative backend. "Part II" grossed $581 million worldwide, meaning Cooper, Galifianakis and Helms upped their take-home salaries to somewhere in the mid-teens for making the film.
For the studio, making "The Hangover 3" is a priority -- especially with Harry Potter and Batman running their respective courses as franchises. Whether it's a priority for viewers, of course, remains to be seen. "The Hangover Part II" was woefully reviewed despite earning so much money, with many complaining that it was a less-funny retread of the beloved first film.
The threequel would likely take place in Los Angeles and -- if all deals are signed -- shoot this summer. Warner Bros. is hoping to release it over Memorial Day weekend in 2013.