document: The NEW `` The Hangover Part 2 '' trailer The Wolfpack is Back ! This , according to the teaser trailer for '' `` The Hangover Part II '' '' which came out a short while ago . Movie audiences did not get much information about the plot , just pals Phil , Stu , and Alan -LRB- Bradley Cooper , Zach Galifianakis and Ed Helms -RRB- walking through the streets of Thiland with a small monkey leading the way . The new trailer now let 's us in on the plot of the film . Check out the trailer in the sidebar to see what it 's all about . Some characters from the first movie is back along with some new ones -LRB- I 'll let you see the trailer for yourself so I do n't spoil any surprises for you -RRB- . Following up the most successful R-rated comedy of all time will be tough . My first impressions of this trailer is not steller , but perhaps you will feel different . Please let me know . Enjoy ! Advertisement
extractive_keyphrases: information impressions galifianakis sidebar thiland leading teaser different trailer comedy surprises hangover successful steller rrated wolfpack movie audiences pals small alan some characters movie