Earth-40 is a world where costumed heroes and villains have joined World War II as covert government operatives. The Batman of this world, known as "The Bat", is later transformed into a vampire during a battle with the Batman of Earth-43.
The Unholy Three:
The Bat
The Clock
The Owl
Other U.S. Operatives:
Mister Terrific
The Lantern
Mercury
The Sandman
The Hawk
The Huntress
The Star
The Tornado
Enemy Operatives:
Jack the Grin
The Scarecrow
Parasite
Steelwolf
Superman