I'd say that the REAL mystery isn't what the exclusive will be...the REAL mystery is who the "unnamed editor" leaking the news could be! Whoever it is, I'm sure he's credible...both as an EE source and a totally, unbiased "reporter" for another fansite.
It's transparent shilling at it's finest, but I like to speculate, so I'll play the game.
On the figure front, we know it's not going to be a figure that requires tooling...that's far too expensive, and EE is not a company with pockets that deep. So that leaves us with a repaint, which makes a clone or commando a possibility. I can't really see the big "H" giving EE a member of Delta Squad...too much money to be made on the retail front with those, I think. An all-white commando though...that would be cool. Kir Kanos seems possible, but unlikely. Most Star Wars fans have never even heard of him.
Whoever it is, I'm sure most of the ideas we come up with here will be better than what we actually get.