As previously hinted, Square Enix will be revealing the latest entry in its Final Fantasy XIII "Lightning Saga" at the upcoming Final Fantasy anniversary event in Tokyo's Shibuya on September 1.
Square Enix's Yoshinori Kitase confirmed to Famitsu that work on the latest entry in the Lightning Saga has "just begun". At the Final Fantasy event, the game's official title will also be revealed. So, Final Fantasy XIII-3: Lightning's Saga?
スクエニ北瀬氏「FFXIIIプロジェクトの新展開"ライトニングサーガ"は走り始めたばかり」 [ゲーム情報！ゲームのはなし]