Crossovers Challenge!

It's the Crossovers Challenge!
The challenge will run from Sept 1st - Oct 15th. That's just a about 3 weeks left to create a fic of at least 1000 words, or 10 icons or 5 banners or a wallpaper.
I'll attempt at least once a week to leave you with a couple of ideas to help get the ball rolling:
Today's ideas:
1. A character from show A and a character from show B stop the apocalypse
2. A character from show A and a character from show B meet their doppelganger
And don't forget if you participate I'm offering banners.
