Heh. I think for me having Peter express the painting he made of him & Kitty is waiting for her at their honeymoon suite is classic set up for one of the pair to be heartbroken when they later stop by the suite to grab heir suitcase or whatever after the wedding not going through. Like, otherwise, they would have kept the reveal of his gift to the end of the issue if they’d actually managed to get married because there’s the emotional pay off. Setting up early that there is a emotional gift waiting for them wastes unnecessary panel time if all goes well.
As for Mr. & Mrs. X, I suppose since we know Xavier survived Astonishing as X with a new dream or whatever, it makes a case why they’ve kept the details on the DL. But how it connects to Gold #30 is what we don’t know. He went to all the trouble of removing his existence from everyone’s brains except to Psylocke so I can’t see him just walking into the wedding like “sorry i’m late lol” Maybe he’s watching from a distance (ha! Not weird at all) and he reflects on how important marriage is and decided to follow up with Mystque...? Yeah, IDK