A series called Irredeemable ended last night, Its written by Mark Waid who has done great work with Kingdom Come and Daredevil, and for me personally this is his masterpiece.
There are a lot of Superman knock offs out there, some have more substance than others, some are just superman with a twist, Hyperion is just a gritty version and Apollo is just a gay superman, but this is a far more complex look at the character.
It's a "what if superman went bad?" story that actually has a complex and layered reasoning for his breakdown. Even his name Plutonian indicating alien has the double meaning of disconnected and remote.
You can read the first few pages here, which introduces Plutonian through his murder of the Batman character and his family.http://www.boom-studios.com/irredeemable-1-cover-a.html