A Fourth Bourne Flick? Forget About It?

This past Sunday, The Bourne Ultimatum took home three technical Oscars for editing, sound editing and sound mixing - every category in which it was nominated. In response, Universal has enlisted director Paul Greengrass and star Matt Damon in its effort to stage a fourth Bourne film.
But wait, you ask? Didn't Jason Bourne ( spoiler alert) recover his memory in Ultimatum, thus eliminating the series' central concept? Um, well, yeah. In fact, Damon said as much while promoting No. 3: "The reality is... the story of this guy's search for his identity is over. He's got all the answers. What would the fourth [film] be about?"
[ Dream sequence music]
[ I raise my hand]
"Yes, Mr. O'Connor?"
"Here's an idea, Mr. Damon. What if Jason tried to find and/or rescue other assassins who'd had their memories altered?"
[ Damon shrugs and turns to his publicist with a bug-eyed, get-me-out-of-here look]
"OK, last question, folks."
[ End dream sequence music]
Well, I tried. Your turn: What's your bright idea for a fourth Bourne flick? Make it memorable! - Mickey O'Connor