Loving it so far. I was a fan of the demo and as one would hope the game is much better.
Early impressions, The Joker is great fun to play as with a lot of character in his move set.
The cutscenes and story are entertaining (though I'm not finished it yet). And yes they provide a reason why relatively weak human super heroes can stand up to the more powerful ones.
Normal difficulty seems ramped up quite a bit higher than it was in the demo.
DLC is not available yet on the PSN, codes don't work, so I guess that won't happen until the store updates or the games official release date hits.
Have been waiting this whole generation for a good 'pure' super hero fighter (not Marvel/capcom or DC/MK) to come along and it's finally here. This aint no slashie folks (Zoolander reference).