Good suggestion. Jon's origin definitely needs tweaking, as he shouldn't even be born until after Conner becomes Superboy since Lois and Clark only married after Death of Superman, which is where Conner debuted. As such, Jon couldn't possibly have been 11 years old when Bendis aged him up to 18. He'd have been no older than 5 (otherwise Conner and the rest of Young Justice get aged up too much - they should be seven years older than Damian, which is about 22 now, but Jon being 11 would, allowing for Lois's pregnancy, make Conner 12 years older than when he debuted - about 28). Accelerated aging would fix that. Kryptonians have long lifespans, so it becomes a moot point when Jon is an adult anyway.