Putting DLC on the disk is a con because it means it was ready at the time the discs were created. Day one dlc is different since it something the developers worked on after the discs went to print!!
Despite this there are a glut of fighting games on the market so that analysis may well be correct
I think after a strong launch line-up the follow up titles have been poor ( as in few and far between ). Sony need to get some new titles on the shelves for those of us that bought all the "good" titles at launch and to encourage new sales!
SadPSPAddict's comments