The words "To be continued" at the end of Final Fantasy 13-2 is no indication of a third part of the 13er series. Square Enix also confirmed that it was in Final Fantasy 10 is a high-definition remake of the PS2 classic.
(Final Fantasy XIII-2, PS3, Xbox 360)
Square will continue to say that the game's not being made, until they announce that its being made. That's just the logic they seem to be operating in currently - Can't see the issues of such reasoning, especially when many who where once loyal to franchise are vocally saying they don't want it.
I bought FFXIII-2 and I liked it.
If they make FFXIII-3 I'll be getting that as well.
People want to see Versus now, you're holding shit up.