Remember the old days when Superman was strong enough to punch planets out of orbits? Sure, he was popular for a bit, but his popularity went tumbling down. What did they do as a response? They toned down his strength, significantly. He could actually be hurt! People like Darkseid, Doomsday, Green Lantern (not changing ring to kryptonite light), Wonderwoman, and many others could hurt him. Hell, even in crossovers they made Hulk, Thor, and several others hurt him. His sales went up and so did his popularity again.In an interview with Joe Casey on Alvaro's ComicBoards, he states that Superman can re-arrange the Solar System and tear a star apart. "I've always seen Superman as this completely over-the-top, fantastic character who has no limits whatsoever," writes Casey. Unencumbered by mental blocks, "Superman is unbeatable."
Why would they do this to him again? I don't understand, why ruin Superman? Whats the point of reading a story about an unbeatable guy if you know the only way he can lose is to a rock? Pfft.