If we are giving kid Jon Kent and kid Damian Wayne a full team. I vote nobody aka Maya Ducard and these guys
https://www.tumblr.com/zook-x/805010641594236929/have-you-heard-of-irey-and-jai-west-irey-has?source=share
https://www.tumblr.com/zook-x/804650662207094784/now-i-feel-like-these-two-dc-characters-need-more?source=share
Although Zyx isn't a comic character.
I've never heard of them (I haven't read a lot about the new 52 tbh not my favorites), but I totally agre!!!! They could fit pretty well in Jon and Damian's team and, except Zyx, everyone seems to be a son of a hero/villain, so they match the supersons theme and they could have such great dynamics and explore topics of legacy, parenting, growing up as a hero/villain, etc. Zyx could be so interesting as a character and I think he and Damian can get along- both were raised in a strict place and likes animals.
Now this is my team for Damian and Jon I don't care about what dc says, op you've opened my mind.