Think I'll just reiterate my opinion, cause I feel I didn't defend it properly before.

I believe the Spiderman shirt logically indicates Blue Mage, or some form of Blue Mage incorporating Beastmaster and/or Morpher elements to it. I also believe Samurai will be added in this expansion. RDM/BLU/SAM feels like the appropriate trio for us this round. DNC wouldn't have been out of place, but I'm guessing SE will be holding it back for a future expansion, perhaps 5.0. Anyways, those are just my predictions.