Class 800 in Tsw3 could become the first hybrid train possibly with extension of GWE. TGV Reseau are the oldest and would be nice another french dlc with Paris GDL and Lyon st. Exupery or other station
Offer a route, stations, landmarks etc. if you're gonna suggest new stock. If not for an existing route that is. The Réseau Duplex runs on the Méditerranée as far as I reckon, so it could be a loco add on for that route.
Not for gwe. Gwe is stuck in a weird era when ohle was only partially placed down, not the whole route so the 800 wouldn't work. I don't think it ran in 2015 either. So gwe can only get a train appropriate for the era like a 165. If an 800 ever came, it would be for a different route. The tgv is a good choice as well