That's pretty much the only time I've ever seen that happen.
As a long time Deadpool fan, this almost amounts to a perfect buy for me. A wonderfully heartwarming story about my favorite superhero's wedding, plus 60 more pages of Deadpool doing what he does best. It's price tag is a little hefty ($10), but I definitely say it's worth it.
As the world record breaking cover indicates, tons of Marvel characters make cameos, including Captain America, Wolverine, Cable, Nightcrawler (who officiates), Thor, Hulk, She-Hulk, Jean Grey, Cyclops, Doctor Strange, etc. The only one who's absence seems to stick out the most is Spider-Man, but I can chalk that up to the fact that Superior is still going on. Which sucks. They only got one chance to make a "One More Day" joke.
The blushing bride is Shiklah, the monster princess who first appeared in "Deadpool: The Gauntlet", and honestly, they're great together. And it's just nice to see Deadpool have a happy moment after the last story arc.
Nothing goes wrong, no villains or mercenaries crash the ceremony. There's tons of great jokes and heartwarming moments.
It's just a wonderful, feel good issue.
And it just sucks knowing it's not going to last.