 Following the replacement of the 1000, 4000 and 5000-series cars with the new 7000-series between 2016 and 2018, Metro has proposed that all 366 2000-series and 3000-series cars be replaced by the 8000-series cars.Metro considered using an open gangway married pair- or quad-configuration design concept for the 8000-series railcars, but decided against advancing those designs.Other features being considered include wider doors, larger windows, WiFi, heated floors and passenger-operated door push-buttons.