Well, I just came up with a seven way crossover, and I'd like to know what you guys think of it (prepares for pain).
I'm planning on using six lackeys from six fandoms getting transported to a seventh world at critical points in their lives. These individuals are:
Larry Mom (Futurama)
Bass (MegaMan)
Rouge the Bat (Sonic the Hedgehog)
Shenzi the Hyena (The Lion King)
Iago (Aladdin)
Megara (Hercules)
And they're all going to be winding up in the universe of Kingdom Hearts. Yeah, I know they're not ALL Disney, but if that keyblade can open any door, it can get to Capcom-land and Mobius too. And don't worry, there won't be any extra keyblades.
It's a convulted mishmash of different people who would normally spit in each other's faces, seeing how they fare together.