[godisawesome]

I'd save Superboy for a post-Lex as the big bad movie, where they can use Lex's creation of Conner as a reveal of just how far he's willing to go for persoanl and petty revenge.

Picture a Conner who's introduced as a government-created back-up for Superman that get's released by Clark when he finds out about him. Conner developes a personality and a close bond with Superman, only for the returning Lex to reveal he helped create Conner and implanted a Manchurian Canidate who then targets everyone Clark holds dear and we get to see Clark trying to keep a Superboy, who is at war with himself under the surface, from killing their friends and family.