Wikipedia claims the X0 of this snowclone, “WWJD?” for “what would Jesus do?” became popular in the 1990s “as a personal motto for … Christians who used the phrase as a reminder of their belief that Jesus is the example to be followed in daily life, and to act in a manner of which Jesus would approve.” Subsequent Xs are intended as tongue-in-cheek role models, to contrast with Jesus, and include Brian Boitano, Patrick Swayze, Dumbledore, Snape, Xena, and Dubya.
The Jesus of the X0 phrase is also sometimes fixed, so that instances like “what would Jesus bomb?” are also acceptable.
The Snowclones Database 
DDWW?
What would dyslexics do?
WWSD?
What would Snowclones do?
WWS-D?
What would Scooby-Doo?
My favorite is WWGD?
“What would Gandalf do?”
What would Machiavelli Do?
http://www.amazon.com/What-Would-Machiavelli-Justify-Meanness/dp/0066620112
WWJD can also be used to get people to read spam, as I mention here…http://unfocusedcontent.com/2004/08/03/what-would-jesus-do/
Just spotted on GodTube:
What would Jesus download?
We don’t need no stinking is the new considered harmful.
What Wouldn’t Jesus Do?
The webcomic DrMcNinja plays off of this snowclone, with the line “What would Batman do?”
They accordingly sell a t-shirt with the acronym slogan, with the Batman bat symbol replacing the ‘B’.
Then of course there’s the promotion for Harold and Kumar go to White Castle with “What Would Neal Patrick Harris Do?” (WWNPHD). If I’m not mistaken, there’s even a dedicated Web site about it.
And there is the mix ‘n match from advertising:
“What Would Jesus Do for a Klondike Bar?”
There’s also the alternate WWJD:
What Would Jon [Stewart] Do?
There are T-shirts of that one.
What Would Wellstone Do?
In Minnesota he would buy the bumper sticker.