Personally, beyond teaching him how to control his powers, I doubt Cadmus would have focused much on Krypton, both because they destroyed themselves essentially, and because it wouldn't be important exactly anyway.  So if it was me, I'd say have Conner make the pilgrimage to Superman's Fortress of Solitude as part of his character arc.  Just an idea.<br/><br/>Speaking of, I have Tanner to thank for bringing this up, but who exactly got M'gann out of that Lexcorp lab she was held up in for three months before Darkseid attacked?  Just wanting to clear that up now while I'm thinking about it.