Finally some clues about "Hangover 2" as the teaser trailer is released. The trailer shows the return of "The Wolfpack" -- Bradley Cooper, Ed Helms, Zach Galifianakis minus Justin Bartha -- getting up to mischief once more.

The movie doesn't hit theatres until May 26 in the U.S., but already there's quite a buzz.

Just a couple of hints are given in the trailer. Helms seems to have a Mike Tyson-style face tattoo on his face which we can only presume is the work of Liam Neeson's character the Tattoo Guy.  Tyson is also confirmed to be starring as himself.

This new teaser certainly promises an awful lot. We just hope the movie lives up to the hype.