I don't want to drag out an old debate but wanted to talk about the overlord effect that hawkman was talking about.
He said that "The overlord effect is a forced firing of a ships hyper drive engines".
It basically forced the ships to fire their hyper drive engines, the ships were then flung billion light years away using their own power.
He also stated that superman won't get affected because "Superman is a human being. He has no drive engines".
He thought that since superman didn't have hyperdrive ability or engines, the overlord effect had nothing to use to fling him. But since superman was flung by the overlord then it stands to reason that he has hyperdrive ability and since the the overlord effect uses the engines of the ships to force fire them, it stands to reason that the overlord effect used superman's ability to toss him into deep space.
Not sure how far he was flung, other ships were flung billion light years, so why not superman? I think the distance is open to debate, but superman was flung using his own power and ability.