But you should expect the film to not just be a carbon copy of the first one! http://www.rottentomatoes.com/m/the_hangover_2/
i saw the trailers for this and it looks like absolute crap and just a money spin rip off of the first one. As for british humour, well give me Monty Python any day.
South park is more smart comedy then anything though. Yeah there are some small odd jokes to keep the story going, but look at the overall theme of the episode. The Tom Cruise and Scientology episode, put out what they actually believe and always put out the joke that Tom Cruise is gay, then there was the episode that Chef died. Isaac Hayes left South Park because he was a Scientologist and Matt Stone and Trey Parker poked fun at it, but Matt and Trey make fun of everything. If you're gonna make fun of on subject, you gotta make fun of them all. Back on topic now, Isaac Hayes said that South Park wouldn't last without him. Well South Park is still going strong even now. Even the Family guy episode South Park is true, Family guy gets laughs by just making random jokes that make no sense over and over and over, and gets cheap laughs out of it.