According to the British Board of Film Classification, some deleted scenes from Harry Potter and the Order of the Phoenix will make it into the "extras" part of the DVD. On the site, they fall under the name "Deleted Dramatic Clips" and they run for a total of 10 minutes and 10 seconds. The list is:

00:02:31:17 "TRELAWNY EATING"
00:00:13:08 "NEVILLE SPEAKS UP FOR HARRY"
00:00:26:02 "STEADY CAM AROUND"
00:02:46:18 "UMBRIDGE QUESTIONS TRELAWNY"
00:00:17:21 "MALFOY CRABBE AND GOYLE BULLY A STUDENT"
00:00:21:06 "FILTCH BLOWS ON UMBRIDGE'S HAIR"
00:01:47:14 "HARRY HERMIONE AND UMBRIDGE - EXTENDED"
00:00:37:22 "HARRY ENTERS"
00:01:07:23 "HARRY AND RON PACKING"

Rumor still has it that Harry Potter and the Order of the Phoenix will be released on November 12th.

Thanks HPANA!

Additionally The Movie Insider has what appears to be the cover art for the DVD which can be seen here. Features listed on the back cover are as follows;