Am I...reading too much into this...?
From Action Comics Annual #12.
After the events of Last Son, Chris makes do in the Phantom Zone for while (aided by Non, of all people), until getting caught by his blood parents again.
Did this just imply what I think it just implied? Probably not, but still...keeping in mind that the rest of this issue is as equally brutal and bleak. Masterfully-written, as to be expected from Rucka, but...brutal and bleak.