Superman & Batman: GenerationsSuperman & Batman: Generations.

Superman & Batman: Generations is the umbrella title of three Elseworlds comic book limited series published by DC Comics in the United States, written and illustrated by John Byrne. A major concept of the series is the avoidance of the floating timeline; it places Superman, Batman, and the other members of the DC Universe in a single timeline, showing the characters aging and being replaced by their progeny. The Elseworlds story Batman & Captain America, co-published with Marvel Comics and written/drawn by John Byrne, was released in 1996.