During the wedding of Storm and Black Panther, Uatu the Watcher showed up. There was a significance as to why Uatu was there.
and on Fantastic Four #544, Uatu said:
So why didn't Uatu showed up during their fight?
If Uatu showed up during their fight, the result could have been different. Well, usually, when talking about having children, even a guy's tough heart softens.
Or when Black Panther was thinking about nullifying the marriage, Uatu would have showed up and reminded him of the astonishing destiny of their children right?