The old Advent Children OVA seems to get an extended version "Advent Children Complete". Old news it seems but now it's the first time I've heard of it.
Current release date: April 16 2009.
English Wikipedia:
At the 2008 Square Enix DKΣ3713 Party, it was announced that Final Fantasy VII Advent Children Complete would be released in March 2009 in Japan, although the currently confirmed release date is April 16, 2009. A separate bundle will be sold that includes a demo of Final Fantasy XIII. Both editions will include the first HD trailers of Final Fantasy Versus XIII and Final Fantasy Agito XIII, making them the first released HD trailers of the Fabula Nova Crystallis series. It has also been reported that the film will feature a 20-minute long extra movie after the credits.

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