It appears Arc System Works is working on a PlayStation Vita port of AeternoBlade, a side-scrolling fantasy game for Nintendo 3DS. The game was renamed Time Avenger for Vita, but other than having Japanese text it looks like the same game.
CoreCell Technology, the company that makes Time Avenger/AeternoBlade, is pretty unique. They’re one of the few console developers in Thailand and they worked on two PlayStation Move games. Crazy Strike Bowling was licensed by Aksys. They also have a light gun game called Wicked Monsters Blast which was first released on Wii then ported to PlayStation 3.
Time Avenger is scheduled to come out for Vita in Japan this December and will cost 1,500 yen. The 3DS version is out in North America now.