Front
Back (apologies for my handwriting!)
As an FYI, the postcard is from a gift shop in San Antonio, Texas.
The text of the postcard is:
Dear Ellen,
Who do you think would win in a dance fight between Batman and Superman?
GetBradStanleyPublished
.com
P.S. Batman is not allowed a metronome in his utility belt.
DumbFunnery 
Comments on: "Attn: Ellen (10/6/10)" (2)
Ten kinds of awesome. Personally I think Superman would win since he can actually walk on the moon.
Dang. I think you just ended the debate of the century in one line. Kudos.