Genso Suikoden Tsumugareshi Hyakunen no Toki for PSP.
( Roughly translates Suikoden: Centennial Tapestry )
The story of the game centers around a group of people who must defeat a terrible monster that attempts to destroy everything every one hundred years. The main character (voiced by Hiroshi Kamiya [Tieria Erde in Gundam 00 & Yuzuru Otonashi in Angel Beats!] ) was sent to one hundred years into the past by a girl named Zephon.
Some of the screen shot from trailer:
Nothing else was revealed about the game including details on the battle system, so Suikoden fans just have to wait patiently. Coming soon.