Well, the Réseau and the Réseau DUPLEX could travel on the current LGV Méditerranée. I would exclude the Atlantique, given its imminent withdrawal from service. The POS operates services between Eastern France and Western Germany. The TGV Atlantique, with only 28 trains remaining in service, travels on the LGV Atlantique and the LGV Sud Europe Atlantique. The possible liveries (also for the N2N already present) would be the Carmillon, the INOui and the OuiGO.
it currently only makes sense to bring loco addons for routes what are in TSW before the loco packs release, anything else won’t be done.
Correct both POS and 2N2 are PZB LZB Sifa equipped making them suitable for Germany and Austria. Remember to use Control Shift P to close MCB P raise pans otherwise, you're using the 1.45m Carbon/Copper strip for DB OBB 15kv 16.7hz AC which causes a powerlock. Because in reality DB/ÖBB 15kv 16.7hz AC OHLE is meant to be used by a 1.95m width Carbon/Metalized Carbon pantograph.
Yes, if I remember correctly the version of the 2N2 and POS used is the three-current version (25kV and 15kV AC, 1.5kV DC). It also make sense to introduce the ex Thalys PKBA (same power supplies as the previous ones but with the addition of a 3kV DC). The LGV Nord, Est or Rhin-Rhône could be brought to TSW. In latter case, the Lyria version of the Duplex and Réseau should be introduced. The TMST Eurostar could also be introduced, on a possible LGV Nord and to be used as a layer on the Southeastern Highspeed.
