08:37:57 AM May 12th 2010
I changed the reference to the court ruling that the Siegels only have rights to the "Teenage Superman" version. I was unable to find a source for this and the newest article I can find on Newsarama (May 2009) indicates it's a bit more complicated. Basically, at one point it seemed possible that DC would lose all the rights to Superboy. Currently, it seems like DC can only lose half the rights. If they have half the rights, they are allowed to use the character, they just need to pay royalties. And since the creators also claim half the rights to Superman, using Superman instead of Superboy isn't going to help DC. Nothing in this has to do with the rights being limited to the teenage Superman only.