Not really a surprise when you think about it since the first one was so well received.
I've got nothing in the way of details for developer Sucker Punch's PS3 exclusive sequel except there will be a new city, some new powers, new gameplay (?) and he still doesn't have a costume.
It is a superhero game right guys?
Edit: I left it out of the original post but i2 will be detailed in the next issue of Gameinformer.