Crossovers

What crossovers do you think are the best idea?

I can't wait for the upcoming Simpsons/Family Guy and Batman/Superman crossovers! The preview for 'The Simpsons Guy' looks amazing! And Homer and Peter's fight is hilarious!

Here are some examples of crossovers:
'The Jetsons Meet The Flintstones'
'Simpsorama' (Simpsons/Futurama)
'Mario and Sonic at the Olympic Games' series
'Disney Infinity' (Pirates of the Caribbean, Monsters University, The Incredibles, etc.)
'Angry Birds: Star Wars'
'The Lego Movie' (Batman, Superman, Wonder Woman, Green Lantern, etc.)

'The Simpsons Guy' airs tonight on Fox! XD