Why not just go with the "Man of Steel?"
I'm sure there would be copyright issues with "Man of Steel"
Although I'm not a huge fan of Steely, I think Herc hit the nail on the head.
As a parent trying to raise my 2 year old daughter as the appropriate sports fan, mascots are very helpful. Kids really dig the big foam creatures and it gives them something to identify with.
I don't get to many games in Pittsburgh, but at local minor league baseball games (H-Burg Senators and Lancaster Barnstormers) my daughter absolutely loves the mascots.