My favorite generas are simulation sports, racing, and RPGs, not necessarily in that order. I think 3-4 fighting games is plenty (too many in my opinion) for a 6 month span, and games like Blitz or Jam may be fine for a few folks, I would love to see some research from Sony that indicates these have mass market appeal.
I bet Blitz and Jam are considered "safe" - because they are arcade based, they should have wider appeal. They are also old, so it is almost a throw away on the part of Sony and the publishers.
In 2013 I expect to see more older first party games, not newer titles. For third party publishers, expect to see titles similar to BioShock 2 - new version is upcoming so why not see if they can get a little momentum from PS+ subscribers in the way of excitement for the newer version or DLC purchases for the older version.