I talked with one of the managers while I was there, I think it was Justin, and he said the plans for the park next door are to split it into three parts. Farthest from the restaurant will be a dog park, in the middle a Jazz park. He said they are going to have a hill on the backside of the jazz area with the hill carved out and a band inside the hill for concerts. The third part closest to the restaurant will be an outdoor patio seating 30 for Acadia.
Sounds good to us. We would assume that the food and pricing will be in line with an outdoor "cafe", but haven't heard that confirmed anywhere yet.
Addition - For those looking for more Acadia information, here is a link and video from the ABC7 Hungry Hound segment:
(Hat tip: AH and Allen!)