Final Fantasy XIII-2’s To Be Continued Explained

Andriasang writes, "Spoiler alert! Final Fantasy XIII-2 ends with the message 'To Be Continued.' Is this a hint at a Final Fantasy XIII-3?

Director Motomu Toriyama was asked about the meaning of the statement during a group interview session following a FFXIII-2 stage event at the Taipei Game Show 2012 event yesterday."