We already knew that the PS Vita Exclusive action game by SCE Japan Studio Freeedom Wars was to be showcased on December the 21st at the Makuhari Messe in Tokyo, but looks like the game is in a more advanced stage of development than many expected, as announced by the new Twitter account Propakun (translated from Japanese).
<<Emergency Announcement>> We will exhibit Freedom Wars at Jump Festa, to be held on December 21st and 22nd at the Makuhari Messe. It’ll be actually possible to play the game there. Everyone is a criminal, so please prepare for a life as prisoner in the prison city state Panopticon! Let’s Makuhari!
So there you have it. Personally I did not expect Sony to have a playable build at the event, as we’ve seen very little of the game so far and it doesn’t even have a release date yet. Considering the news, we’re probably going to hear of a release date soon.