Complex sentence: Originally, Dr. Fate was depicted as an agent for Order and thus for the forces of Good; since the standings of the sides were revised, it was revealed that Fate's role is intended to be as an agent of balance between Order and Chaos.
Split into simpler sentences: Originally, Dr. Fate was depicted as an agent for Order and thus for the forces of Good. When the standings of the sides were revised, Fate's role was changed so that he became a balancing force between Order and Chaos.