Sinestro did not know why Mobius held Ultraman in such high regard. During these years in the antimatter universe, Sinestro had been coldly observing this vast universe. In the past, as the leader of the Green Lantern Corps, he had led the Green Lanterns in battle against the armies of the antimatter universe year-round. He had often taken the initiative to invade the antimatter universe, though he was always driven back in the end. Sinestro had his own opinion of Mobius, the nominal ruler of the antimatter universe.