Update: Apparently Jump Magazine has revealed that the game indeed will be Blood of Bahamut for the Nintendo DS.
Square-Enix has opened up a new website with a countdown timer portraying what appears to be Bahamut and possibly Alexander, summonable creatures from the Final Fantasy franchise.
The only real concrete information we have is that the webpage's icon is labeled as bob.ico, which most likely refer to the title Blood of Bahamut which Square-Enix trademarked back in September 2008 in the United States.
Speculations are already pouring out from all around the internet and we have listed some of them after the jump.
We'll have to just wait till Monday to find out what this is.