"Many have wondered whether The Last Guardian could have been released on PS3 without technical holdups and shortcomings. The answer was presumed to be no by many, but creator and director Fumito Ueda says differently. He claims that hardware issues for his games pretty much evaporated with the release of the PS3." -PSLS
WB reportedly knew about the Arkham Knight's PC issues and The Last Guardian saved thanks to fan demand. Plus free Fallout 3 on X1 requirements and PS4 software system update details.
Sony says the game needs to sell pretty well in order to become profitable, but the sales potential for this new IP may not be anywhere near high enough.