I really like the original East Coat Mainline that came with Railworks it would be nice if they recreated it in TSW Rolling Stock Class 55 Class 43 Intercity 125 Class 47
I could go for a bit of that action. For the life of me, I can't get my head around why DTG seem so reluctant to give us a Deltic. If the BR blue routes and loco addons sell well, surely that would be guaranteed money in the bank for them.
Mk2D/E/Fs and Mk1 catering vehicles, would be a must. I think that Newcastle - York would still be the best option as it gives you the most operational diversity with plenty of freight and Passenger workings. Also you wouldn't be limited to just ECML only services, as you can have Trans-Pennine services, and the North East-South West services as well as others.
You mean Newcastle York Manchester services via Huddersfield Leeds Standege Tunnel. From what I am seeing looks like you're trying to extend NTP by making ECML Leeds Newcastle via York segement.
I suppose it would be possible, but DTG have said they wont do route extensions. But... If it was Newcastle to Leeds, there wouldn't be any reason why not to continue a scenario from one route to another.