Ah yes, 2 Weeks after the death of Southeastern, a Southeastern Suggestion This route would feature the 32 Mile Line from London Victoria to Gillingham, the 30 Mile Line from London Charing Cross to Gillingham, and the 16 Mile line from Gillingham to Faversham for a combined total of 78 Miles. Stock: This route has many opportunities for Rolling Stock: Included: Class 375 - Electrostar: This loco, already being in TSW, would pretty much be a combination of the SEHS 375 core and the BML 377s PIS system. This loco is one of 2 Principal EMU locos, after the Class 465 - Networker: This loco, like the 375, being already in TSW, would likely be the Current 465 with some upgrades, such as the Upgraded PIS from BML DLC: Class 707 - City Beam: A completely new loco series to both TS Classic and TSW, the Class 707 City Beam recently transferred to SE Trains, which they inherited from Southeastern, which they obtained after they were replaced by South Western Railway, which in turn had inherited them from South West Trains. It operates the London - Dartford Services
I think it would be better split into two routes, Chatham Main Line and North Kent Line, then merged if and when that becomes possible as a feature in the base game. Also note that other lines might be needed, such as the Catford loop and Bexleyheath/Sidcup lines for a better scope of services (or some services would only be partially driven or as AI only).
Let me see, The Chatham Mainline (33mi 45ch London - Rochester), and the North Kent Line (31mi 37ch London - Strood), and a 26 mile overlap with Southeastern High-speed. Not to mention the fact it practically makes the 465 DLC obsolete etc, etc.
It's going to be done as London to Gravesend North Kent Line and London Victoria to Rochester Chattam Main Line with those being sold with SEHS as a bundle called Southeastern Network London Charing Cross Victoria and St Pancras to Faversham. For the network BREL 465 Standard SEHS gives 375 465/9 DLC 707