So basically I think that the Nuremberg Metro would be a nice addition to the game as we only have a single metro right now. I think that we could see 2 different EMUs that are in service there today: G1 and DT2. This would give it a bit of variety that London Metro lacks.
I have been on the Nuremberg U Bahn and it was a really enjoyable journey aboard a classic locomotive . I hope this is added