If, and only IF the universe survives the typhoon of utter chaos Haruhi's pregnancy will bring about, there's off course the issue of the child. Will the child also have God/Goddess powers? That's something interesting to look at, isn't it?
....wait...we'd have a child who'd decimate whole cities whenever he/she wakes up and cries for mommy....
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"Me want teddy!" the child cried, pointing up at the cute little teddy bear high up on the shelf.
"No, you have to wait patiently for your birthday." Kyon said, picking up the child.
"WAAAH!" The child's ear-splitting cry permeated through the air. The ground underneath Kyon suddenly rumbled.
"Ok! Ok! You get the teddy!" Kyon screamed.
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Not to mention nothing's more powerful than a child's imagination. Imagine the kinds of things that would start munching up the universe, say, when the child watches, for example, Teletubbies.
In fact, you can't get a better example of a universe-decimating children's show than teletubbies.