I think he shouldn't leave because of all the reasons you've already pointed out.
And I believe he wouldn't leave knowing that Lois is pregnant. Nor probably would come to Earth after him anyway, because he sees Kal-El as a threat to his power.
The Council definitely wouldn't approve of Lois having Kal-El's child. It'd be an illegitimate child, after all. This would put Lois and the baby in danger, because Kal-EL would be sentenced to death for treason and the baby could be taken away to NK (the child would be the only descendant left of the House of El).
For this same reason, Nor would want to kill the child.
New story by the weekend, did you say? Woohoo!
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Andreia
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