Bleach Movie 2

You can find some more information about it on:
Official Site
Anime News Network

But for now here’s some info taken from AniDB

Main Title - Gekijouban Bleach: The DiamondDust Rebellion
Official Title Japanese - 劇場版　BLEACH　The DiamondDust Rebellion　もう一つの氷輪丸
Short - Bleach Movie 2
Type - Movie
Year - 22.12.2007

When an artifact known as the “King`s Seal” is stolen during transport from Soul Society, Hitsugaya Toushirou is assigned to retrieve it. Toushirou goes missing after a battle with the thieves, leading Seireitei to suspect him of treachery. They order his immediate capture and execution. Unwilling to believe him capable of such a crime, Ichigo, Rangiku, Rukia, and Renji set out to find Toushirou and clear his name. Meanwhile, Toushirou is still searching for the thieves, and stumbles upon a dark secret involving a shinigami long since dead.