Plans for the renovation of the Mars Theater could be afoot soon, after Springfield City Council’s action at its meeting Tuesday night. Council members approved a proposal from Sanders, Trowell and Associates for architectural design and a Kern-Coleman proposal for engineering services for the Mars Theater project. Sanders, Trowell and Associates will be paid $10,000, with a $5,000 retainer and $5,000 at the issuance of construction documents, and Kern-Coleman will be paid $8,500.