So, a conversation elsewhere got me thinking and I worked this up:
Just for the hell of it: http://thrythlind.blogspot.com/2015/09/urban-fantasy-crossover-scenario.html
I say on that post that it’s too late to run this scenario this weekend, but it is conceivable that I could run this Friday 11pm to 4am my time (9am to 2pm Friday CST).
I could also try to run this Friday after this one since I’m already running 9 one-shots from the 18th to the 23rd.
The specific scenario would depend on just what characters are involved but it would be a cross-reality apocalypse prevention thing.