As a huge romance reader, those tales simply don't appeal to me, which is one of the reasons I would prefer Richard White to die. That type of blended family stuff is nice in real life but it doesn't play well all the time and doesn't usually work in a romance, and I especially can't see it playing well in a Superman movie. Huge amounts of angsty romance like Danielle Steele and Sparks isn't my cup of tea either. Smallville is starting to rack up point in that department, but that's here nor there.
Yes, he could become a villian. That could be interesting, but that would negate him being a Superman copykat. He's a good guy for a reason. He should go out like a good guy in the end.