I can't wait for it. It'll definately be something. I've only watched clips of the movie just so I don't spoil all of it for me. Then there's Shaymin to download. However, if the time frame matches properly (explanation at the bottom of post). Then we should be able to download 2-3 Shaymin, one/two for your Diamond/Pearl and another for Platinum.
Explanation:
Rise of Darkrai aired:
July 14, 2007 in Japan Movie Theatres
February 24, 2008 on Cartoon Network in America
Darkrai Event Dates:
May 31-June 1, 2008 for Toys R Us in North America
Rest of June for Nintendo World Darkrai
Giratina and the Sky's Boquet Shaymin:
July 19, 2008 in Japan Movie Theatre
Speculated February, 2009 in North America
Shaymin Event Date:
Speculated May/June 2009 in North America
Platinum Release Date:
Speculated April/May 2009 in North America
(Diamond and Pearl were released September 28, 2006 in Japan, Platinum was released September 13, 2008 in Japan. So the dates have almost a 2 year interval.)
Because the Movie dates are so strikingly similar, the North American air dates as well as events should be similar as well.