I see no reason they cannot release it other than they are worried about how dire the game is. Surely it could just be released as a single player game with possible online if you are very lucky just like the full game.
The way it has been dealt with by Sony means none of my future games will be Digital from PSN.
Just the opinion of somebody who doesn't really like racing, somebody who doesn't really like games... I can't get past Forza's handling, it's a game that likes to hold your hand for you. DC is very challenging and exhilerating, something that some won't notice.