Buffy's and/or groom's enemies attack their wedding in xover story

[ladyhatshepsut.livejournal.com]

Been concentrating on Marvel fiction for awhiel and I thought I'd come back and try to find this one remembered Buffy crossover that I haven't been able to find.  I still have the image in my head of Sarah Michelle Gellar and Vin Diesel standing at the altar, I just can't remember which of Vin's characters was the groom.  So, it's either Xander Cage (xXx), Dominic Toretto (Fast the Furious) or Richard B. Riddick (Chronicles of Riddick) who is marrying Buffy Summers when the bad guys (his, hers, or both) show up to take them out.  A mistake they don't survive, either discounting her because she's short and a girl, or him because he doesn't have magic or super strength.  Anybody remember this scene, which is most likely just a part of the whole meeting and courting thing?  It's probably vanished into the mists of dead sites and changed names, but I still hope it's out there somewhere.