Infinite Crisis: Fight For the Multiverse — DC Comics
Issue: #29
It's a battle to the death in the skies above Gaslight Metropolis, as a steampunk, mech-suited Luthor takes on his uninvited guests, Prime Batman and Superman.
Creators: Mico Suayan, Dan Abnett, Wes Abbott, Alejandro Sanchez, Ellery Santos, Eduardo Francisco, Jim Chadwick
Characters: Batman, Superman, Hawkgirl, Lex Luthor