By Olivia Regen, Journal Inquirer The first major plan of development, which includes 125 luxury apartments known as Sullivan Avenue Plaza, has been filed for the Geissler’s supermarket area in South Windsor and if approved could bring $601,238 in additional tax revenue to the town, officials say. The Planning and Zoning Commission will consider the proposal and a request for a zone change from commercial to mixed-use development on April 13. Along with the apartments, the $30 million project includes renovation of 60,740 square feet of commercial space at the nearly deserted plaza where Geissler’s supermarket is located at 959 Sullivan Ave. to make room for restaurants, a coffee shop, a salon, or a brew pub, said Greg Nanni, general manager of Prospect Enterprises, the management and development agent for the plaza owner.