re: Paul Giamatti close to signing on for Rhino in "Amazing Spider-Man 2"

I would throw Metallo, Parasite, Bizarro, and Toyman in there as well. The only Superman rogue without redemption IMO is Mxyzptlk. I don't really consider Darkseid a Superman villain either, but the last 10 years in comics and animation have given him a berth in the Superman Universe while Jack Kirby rolls in his grave. But you are right, to each his own.