Green Arrow Secret Files & Origins (2002-) #1

Team Superman and the Atom must make a fantastic voy...journey to save the Man of Steel in part 1 of the 4-part story, “Critical Condition”! Superman has collapsed and now it's up to the Atom and Team Superman (Superboy, Supergirl and Steel) to save him. And the only way to do that is to shrink and enter Superman's body!