Cover art credits confirmed at http://www.alandavis-comicart.com/Checklist.html. Letters credit from Todd Klein via http://kleinletters.com/.
Credits page plus a short description of what the Legends of the Dead Earth concept is about.
This is really a solo story about XS. This is the first appearance of the Gary Concord version of Ultra-Man in 56 years. Gary Concord appeared in All-American Comics from 1939 to 1940. When Gary Concord lost his parents in World War I, he vowed to eliminate war. While working towards that goal in his underground bunker, he was accidentally placed in suspended animation and revived in the 22nd century, where he picked up his struggle for world peace. Here, he was revived in the 100th century.