Batman / Superman: World’s Finest — DC Comics
Issue: #51 C
RRRROOOOOAAAARRRRRR! Uh-oh. That sounds like a T. rex. The World's Finest team enters the lost world of Skartaris — home of Travis Morgan, the Warlord! In a magical realm where Superman's powers are at risk, Batman and Robin trade their masks and capes for swords and sorcery!
First appearances: Tyrant Rex
Creators: Mark Waid, Adrian Gutierrez, Luis Guerrero, Steve Wands, Chris Rosa, Paul Kaminski, Dan Mora, Marie Javins
Characters: Batman, Dick Grayson, Superman, Travis Morgan, Tyrant Rex