At this rate the 12 extra characters will probably roll out on consoles before Vita version in the fall of 2012.
DLC is not really prevalent on mobile. At least not on PSP and 3DS. The PSVita version is basically all of the stuff we’re getting from now until fall.
If you don’t have a PSVita or you’re not getting one, this is still good news as it confirms that these characters exist and they line up with some of the rumors about characters.
Whether or not you like DLC or not (I don’t) they’re here to stay. We can blame Activi$ion, EA, $ony and whoever else that churns out big software for tossing in DLC into music games, adventure games, whatever. It works and it sells. It’s popping up in our fighting games and RPGs.