The green line extension is moving forward with a scaled-back, less expensive plan to bring light rail through Medford and Somerville, the project’s interim management team said, likely leading to a fall request for up to $25 million in aid from Cambridge.

Plans for the Lechmere station are as up in the air as the rest of the green line extension, despite its unique status in the project – it’s an existing station that will be moved, rather than one that is to be built and added to the MBTA system.