Based on the two-part episode "Legacy" of the Superman Animated Series (February 2000).
Darkseid brainwashes Superman into believing he was raised on Apokolips and that he is loyal to the dark ruler. Superman has been missing from Metropolis for some time, so Supergirl steps in to maintain peace in the city. Darkseid turns Superman loose against Earth as a part of his plan to use his victim to attack his own adopted home world.
Lex Luthor halts the invasion by temporarily weakening Superman. The Man of Steel has time to recover from Darkseid’s control, but he is imprisoned by the military and he is sentenced to death. Lois helps Superman escape so that he may pursue Darkseid. On Apokolips, the two titans have an epic battle to conclude the series.
Done in MS Paint.