Hm, well, I don't see it as likely that Diana will bring up her and Clark's past relationship that was apparently ongoing when he was married to Lois.
It's like witchboy said: you can't have both. You can't have a Superman who was single, young, an orphan, and dating Diana and at the same time have the guy we currently have: older, married to Lois, and a father to Jon, with parents who are very much alive.
DC had the choice of which Superman they wanted to bring into the mainstream universe, and they chose the one that more closely resembled how Clark was Pre-Flashpoint. And the current Superman cannot realistically have much of the New 52 backstory with his current status quo.