"The Second Death of Superman"
*The Man of Steel vs. the worst foe the multiverse has ever seen: Superdoom, a demon Superman from an alternate universe! With the Little Man’s true identity revealed, learn more about his plan and why he hates Superman so much. *Source: dccomics.com
"Tales of the Legion of Super-Heroes: Future Tense"
Note: The following solicitation text from DC's website does not describe the back up story.
*And in the backup story, a spotlight on a key moment from Superman’s climactic battle with the Anti-Superman Army! *Source: dccomics.com