No question. There were hundreds of dazzling displays at Comic-Con. You could have your picture taken with “Walking Dead” zombies or frozen Han Solo or Lego Superman. But Predator, as he so often does, dominated. There was a limited edition Blu-Ray edition of “Predator” that came in a very cool Predator head. But the really cool part was this: the first 500 purchases included an action figure of Predator holding a severed head — personalized for the purchaser via a 3D printer. That severed head would have each individual purchaser’s face and hair. The blood dripping from it appeared generic, thankfully.