Hate to deviate from the party line, but I'm pretty sure I wouldn't marry him.
Lois' cultural acclimation is proceeding very nicely - too nicely, if you ask me. I think she's gonna bust a move on Nor before too much longer, and her new abilities (they're coming, really they are) will shock him to his core. She's going to reveal some serious shenanigans by Nor and his cronies, and there will be a change in the leadership of New Krypton. And probably a real revolution in the social structure, too.
Problem is - I don't think that change will be bloodless and peaceful. Nor's plans are too far along, too well-established, too pervasive for him to just smile and nod and cheer the Supreme Ruler's new love. He's this planet's Lex Luthor, and I bet you dollars to donuts that he's got contingency plans in place that would surprise everyone, even Lois. The one saving grace is that Earth didn't blow up, so he won't have any glowing Earthite to use against her, especially since he has no clue about her new-found abilities.
And there's still that problem of finding fresh water to deal with. There's still that problem of lingering sectionalism to resolve. There's still the NK laws concerning what the Supreme Ruler can and cannot do. And while Kal is sure to be willing to follow the law, Nor is not. There's still lots of potential for serious trouble brewing.
I'm ready for Kal's response, even if it's "Lois, I don't read your language, but I'm pretty sure that's not what that letter really says."