http://playstationlifestyle.net/2008/07/17/dont-worry-sony-has-more-exclusives-lined-up/

i Wonder what they are?

This is where Sony will shine the most. Multi platform games on the 360 wont keep M$ ahead in the long run. Sony has the advantage.

The mysterious game SSJ was mentionning ?

^ That could be it

Naughty Dog's next game.

Why would Sony choose not to announce more of them at E3 then? Is this a reflection of game makers' views of E3?

 I would figgure they werent gonna show them, but after MS dropped a bomb, they have to fight bak

I'm not sure why Sony didn't show more at E3, there's a TON of exclusives that we already know about that haven't gotten much attention this E3 :P We know so many of they're internal studio's are all working on something. Sony's been over-hauling like mad style with the in-house stuff as of lately :P

Sony showed more than enough at E3. They will reveal more at Leipzig and TGS.

maybe another game from the ico team