Techniqually they didn't.
You see they already said it wont happen
Then some dude that said he works for Konami said it will happen in 12-14 months. I dont know what else to say then : Wouldnt it be announced at TGS or E3 atleast then? I doubt they will release the game when in 3 months when no announcements have been made. The rumors died when it was released for PS3 only, Now the Xbox family thing revived it.
MGS3 DEJA VU! XD