Order of the Phoenix
The poster for the latest Harry Potter movie was released recently, as was a teaser trailer that's currently playing alongside "Happy Feat." If you want to see the whole trailer you gotta see that movie, but Warner Bros have put up 10 seconds of it up on their website. Check it out here:
http://pdl.warnerbros.com/wbmovies/orderofthephoenix/10seconds/10sec_500.mov