Cue the Steve Jobs "1984" commercial.
Let's picture Assange or one of his cronies engaging in a little creative writing. What topic should he choose? Or, I don't know ... maybe the birth certificate. Let's have Assange create an email from Barack Obama to Rahm Emmanuel. Let's have Obama express concern that people are "getting close to finding out" and have him question Emmanuel about "planting the evidence" in Hawaii, and mentioning money sent to Kenya "to destroy the evidence".
Yeah, type that up and stick it quietly into a batch of Wikileaks files. Put it next to the boring one about State Department diplomats talking to Albania about railroads.
No one needs to say anything. No one needs to make a big announcement. People will find it.
Okay. It's fake. How will anyone prove that? I think the Obama presidency goes down in flames virtually overnight -- through a very quiet, very inexpensive cyber attack. If I had to bet, I'd say that Assange's "insurance" cache contains something very much like this.