From the press release:

Marvel is pleased to present your first look at Ultimate Comics New Ultimates #4, from the superstar creative team of writer Jeph Loeb and artist Frank Cho! IT’S THOR VS. THE ULTIMATES!  Thor’s returned from the underworld, but that’s not good news—he’s on a rampage! When he discovers the depths of Loki’s treachery, Iron Man, Captain America or Hawkeye won’t be able to stop him! How do you put down a god gone mad? Find the answers in Ultimate Comics New Ultimates #4!

Preview Pages:

ULTIMATE COMICS NEW ULTIMATES #4 (JUL100528)
Written by JEPH LOEB
Art & Cover by FRANK CHO
Parental Advisory …$3.99
FOC – 9/23/10, On-Sale – 10/13/10

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