Note: It is of very low quality. It might spoil your sunday....
Thanks to our Japanese bro for capturing this from a Japanese Channel. Tomorrow, a higher quality version (possibly in HD also) will be at AOL UK. So, wait for tomorrow and read transcript from TLC for this moment:
"The new trailer will contain a great deal of new images from the upcoming Harry Potter and the Order of the Phoenix film. Included are many new scenes such as the flight on the Thestrals, the Centaurs, the exciting (and gloriously havoc filled) exit and flight from Hogwarts of Fred and George, scenes with Umbridge talking as well as Filch hammering up the new Proclamations. In addition are more stunning things such as the DA lessons with Harry (even a Patronus lesson), an incredible shot of Voldemort by the Hogwart's Express, Snape, the Order of the Phoenix flying over the river Themes through London, short scenes with Sirius, the Trio, Bellatrix, Dumbledore and Fudge in the Ministry, as well as one amazing glimpse of Azkaban prison. Wow. Harry Potter and the Order of the Phoenix will be released on July 13, 2007."