I get that Superman is a popular cash cow. But if they had an ounce of creativity, they would have kept the excellent cast Brandon Routh but "rebooted" it in a way to come up with a bold NEW cinematic story, like setting the film in the 1930s and have Superman fight Metallo, or doing a movie adaptation of the "death and return of Superman" storyline where he's killed by Doomsday early on, and four sucessor "Superman" emerge claiming to be his heir apparent, and battle amongst themselves. If they REALLY wanted to be bold, they do the "Superman: Red Son" storyline and show what would happen if Superman grew up in the Soviet Union and became a force for Communism instead of freedom.
But if this worthless film makes money, they'll followup with an "exciting" movie about a "rebooted" Lex Luthor investing in real estate and trying to kill Superman with kryponite. Oh joy.
http://en.wikipedia.org/wiki/The_Man_of_Steel_(comics)
This Superman’s origin was re-imagined back in 86’ when the comic book series that this movie was based on was done.