I would have to say December or later as it’s second last route added on roadmap to date and when the roadmap first introduced routes some of them haven’t arrived yet and that was back in September ish
In the future. I have an inkling, though, it will be part of the Rush Hour bundle; it seems tailor-made for it. And we should be seeing that in August or thereabouts.
I would still have to say later than Aug/Sep as arosa was added towards the end of the roadmap in August and released in April perhaps Late OCT or NOV may be more realistic
As it is the current route being built by DTG (the only DTG route in production on the roadmap) it is going to be released a lot sooner than that. It will come out before the Rush Hour bundle or as part of it. When Arosa was added to the roadmap and when it released are irrelevant to this route, partly because DTG didn’t make it and partly because the roadmap is not a timetable.