The series will be written by Mattel Head Writer and Masters of the Universe Lead Creative Rob David and Supervising Producer Lloyd Goldfine. Art and covers for the series will be done by Freddie E. Williams II (Batman/Teenage Mutant Ninja Turtles).
The story will see the ThunderCats villain Mumm-Ra questing for a weapon that rivals Lion-O’s Sword of Omens. His quest finds a weapon in another dimension – He-Man’s Sword of Power. Mumm-Ra’s machinations will cross the divide and thrust Lion-O, Cheetara, Tygra, Panthro, WilyKit and WilyKat into an alliance with He-Man, Battlecat, Teela, Man-At-Arms and the rest of the Masters of the Universe.
"The Power of Grayskull and the Great Eye of Thundera have aligned to make me the luckiest guy on all the earths!" said artist Freddie E. Williams II. "He-Man and ThunderCats were my life when I was in grade school—family and friends knew I loved both cartoons so much. I used to pause episodes and draw from them, since they were so awesome. The He-Man/ThunderCats crossover is the fulfillment of a lifelong goal and my fanboy dream come true! I'm having a blast!"