To anybody that thinks their big PS3 announcement is KH3, solely based on the 'coded' name of the event, sorry:
D --Dissidia Final Fantasy
K -- Kingdom Hearts (there were three of those titles shown: Coded, 358/2 and Birth by Sleep)
Σ -- Sigma Harmonics
3 -- The 3rd Birthday
7 – Final Fantasy VII Advent Children Complete
13 – Fabula Nova Crystallis Final Fantasy XIII (again, three titles shown: Agito, FF XIII and Versus XIII)
It still might be the game, but it's got nothing to do with the name of the event.