Well yes it used to run between Dimapur and Guwahati along with BG Express, but after cancellation of GHY-MXN Intercity and GHY--JTTN-DBRT Intercity both were extended, with BG Express occupying GHY-MXN Intercity's place and Nagaland Exp occupying DBRT Intercity's route. Maybe in future we might see a new Nagaland Express from Zubza after completion of the route, with renaming of the current one.