i personally have a thing against heroes and villains coming back from the dead, i mean in an alternate timeline and a character dies and the fix the correct time line sure...or if that dead character comes back as something else like Hal Jordan becoming Spectre. That's hella cool.
But when Superman came back, among others that dont stay dead....i think why kill them in the first place ( to push comics i guess ) it takes away every single thing that came with there death and sacrifice...if Supes dies again i refuse to read it lol. ( Atleast Superman from the other earth is becoming a Black Lantern)
I hope his return is smart, not just him somewhere in a hospital recovering from amnesia and bullet wounds...or even better he kicks his way out of his grave. If they clone him its a cop out but is better then just
http://comics.ign.com/articles/994/994625p1.html