Will likely never happen now. GWE will probably get nothing new including liveries and branch lines which should have been done.
Ehm I don't think so. DTG aren't editing "old" content unless they convert GWE to TSW2 graphics, but they are just transfering them to TSW2 with the original beeing used, so not gonna happen. But I would also like to see some branch lines when the route stays in 2015.
Note : Its not coming guys. It's not coming in TSW2 either because all development on TSW2020 is stopping, this includes the preserved collection.