DC Universe: Crisis Over Earth-S
by Dan Swanson, with Drivtaan 
When Dr. Sivana’s son Sivana Junior falls in love and intends to go straight, Captain Marvel must make a pact with his old enemy in the hopes that Junior’s genius can now serve mankind! But when a planet-sized menace they call BattleWorld threatens all life on Earth, can the World’s Mightiest Families and the greatest heroes of two Earths come together to save Earth-S in time for Sivana Junior’s wedding? Don’t miss this epic crossover story featuring over thirty super-heroes, including the Marvel Family, Shazam’s Squadron of Justice, the Thunder Family, and the Society of Justice!
Mary Marvel: A League of Monsters
by Libbylawrence, partially adapted from Superman #276 by Elliot S! Maggin and Curt Swan 
Summoned by an old medicine man who reminds her of the old wizard Shazam himself, Mary Marvel travels to a parallel Earth decades ago in the past, where she fights to save the counterparts of the Marvel Family from the clutches of the nefarious Monster League of Evil! But even if she succeeds in saving the Thunder Family — Captain Thunder, Mary Thunder, and Captain Thunder Junior — can she possibly also save their world from being eventually erased from existence in the Crisis on Infinite Earths?