Found this on Gowanus Lounge. Executives from Whole Foods made a presentation to the Park Slope Civic Council and presented renderings. This one is reproduced from a photograph. GL is waiting to get a better picture from the architect.

"The 64,000 square foot store is tentatively slated to open in the summer of 2008. It will have parking for 420 cars
(120 on the roof and 290 in a garage). The main entrance will be on
Third Street, while truck loading will be on Third Avenue. There will
be a 40-foot "promenade" along a branch of the Gowanus behind the store." –Gowanus Lounge