WRITTEN BY MICHAEL TURNER, JOE KELLY AND BRIAN AZZARELLO; ART BY TALENT CALDWELL, JASON GORDER, AND JIM LEE; COVER BY TURNER In stores March 31. In the startling conclusion to the explosive 6-part crossover "Godfall," Kal-El finds out if he can return to Metropolis ? if there's a city left to return to. And in the back-up, get a first look at superstar Jim Lee's take on Superman in a special sketchbook section. FC, 32 PG.