I've been thinking that the new Acela Express can be made from now on since it entered in Service yesterday if you can get the license but it is up to you if you want to do it or not but it would be nice for some or maybe many people to see the fleet in the game to drive. It can be driven on every available North East Corridor DLCs
Seconding this - I'm pretty sure the Avelia Liberty has been suggested a fair few times, so it's presumably something DTG's got their eye on.
it's only been in service for literally days, who knows if Amtrak would be willing to do sth with it right away