I really hope it doesn't have the wedge shape, they're so hard to get open. What I'd really like to see is for them to ditch the optical drive, make it ~40% thinner or so (but with the same thickness throughout) and to fill the rest of the space with a bigger battery.
I've never had the slightest bit of trouble with opening my wedge-shaped Air - there's a large cutout of the bottom panel to allow your finger to fit underneath and get a grip on the lid...