This could be because the game retains its high price tag very well. Not sure about the US but it's still €50 over here - most PS3 games rapidly drop in price. There's no reason to release a €30 GOTY edition when you can sell the core game at a higher price and sell the DLC separately.
Either that or there'll be a PS4 version - I'd actually dig that a lot as I haven't played the game yet (and if I can get the PS3 version for 50 bucks or the better looking PS4 GOTY edition for 60 - yeah, I'd go PS4 then).







