Here's my mini-review of each of those delightfully awesome sweet minifigures.

DC
Mr. Freeze: Alright, but not super-cool. His face looks horrible imo.
Aquaman: Not much to say, except he look just like Aquaman. Great!
White Batman:
Bane: Also very, very nice. The printing on the face has improved a lot!
Commisioner Gordon: I want that SWAT outfit.
Robin: I don't like him with a hood. And that face looks pretty bad as Robin.
Scarecrow: Not nearly as cool as the old one (which I happen to have ).
Jumpsuit Joker: Not much to say about this one.
Penguin: Again, not nearly as cool as the old one (which I happen to have also ).
Harley Quinn - Nurse disguise: That face looks enough like Harley Quinn's to look good.

Looks like there is going to be a new Arkham Asylum set!

Marvel
Nova: Pretty plain, and cool.
The Red Flying dude: *drools*
J. Jonah Jameson: Great representation.
Doctor Doom: I have been waiting so long for there to be a Lego Dr. Doom! And he looks just like the comics!
Spiderman: The colors are definitely better than the old one (which I don't happen to have, unfortunately).
Nick Fury: WHERE IS HIS CAPE, O LEGO?!
Venom: Awesome. Although his mouth is a bit wide.

Overall, these are pretty awesome minifigures, and it's just more Lego stuff I can't wait for but probably won't end up getting anyway.