In the DCEU, Kal-El or Superman is an inspirational member of the Justice League. It is the entire reason the Justice League assembles because they have to fight off the invasion of Steppenwolf without the aid of Superman. Superman is a survivor of Krypton's explosion and comes to earth in the movie Man of Steel. He is then brought up by Johnathan and Martha Kent. During his childhood, he discovers these powers and later becomes Superman in adulthood. His alter ego is Clark Kent,  a journalist for the Daily Planet in Metropolis. In Zach Snyder's Justice League, Superman is coming closer to completing his overall arc to become the true Superman depicted in the comics. The boy scout hero. The SUperman who fights for truth, justice, and the American way.