Complex sentence: After defeating the alternate versions of Black Adam, Sinestro, Hal Jordan, Aquaman, and a subservient Doomsday, Superman engages in a final confrontation against his evil counterpart, and emerges victorious, ending the reign of the High Councillor.
Split into simpler sentences: After defeating the alternate versions of Black Adam, Sinestro, Hal Jordan, Aquaman, and a subservient Doomsday, Superman engages in a final confrontation against his evil counterpart. He emerges victorious, ending the reign of the High Councillor.