I feel like we could use a new NS route. The Chicago line would be an awesome route. It'll come with either NS SD70ACU , AC44C6M, and SD70ACE. For rolling stock, well cars, covered hoppers, high top coal hoppers, NS labeled Autoracks , tank cars, and NS coil cars. The route will start in 71st street yard.
I was thinking about suggesting the one here in Louisville along with the huge CSX yards here as well. Great for scenarios.
The loco suggestions are great, but I think the route needs NS GP60s or Genset Switchers for yard and local duties. An NS ET44AC, ES40DC, ES44DC, or ES44AC could be included as well, or added later as DLC.