City officials in Danbury say a new supermarket may soon fill the long-vacant Stop & Shop on Newtown Road. Economic development advisor Farley Santos says negotiations are moving forward and an announcement could come within weeks. The 59,000-square-foot space at Nutmeg Square Plaza has drawn interest from a number of potential tenants. While no deal has been finalized, officials say a new anchor store would boost foot traffic and help revitalize the busy east-end corridor.