Towered
Superstar
If the Midtown GO Line's "Don Mills" Station is built, expect the "Science Centre" Station on Line 5 AND the Ontario Line to become a very busy transfer station.
Expect Peterborough to become a new commuter destination, IF this happens. Maybe even someplace called Scarborough as well.
The powers-that-be better start gathering real estate around the railway and between the railway and the "Science Centre" Stations (plural) today.
From link.
Maybe by the 22nd century, they could build a Toronto Zoo GO Station, located to the north near Meadowvale Road & Plug Hat Road. May need a zoo train extension to reach it.
View attachment 280937
From link.
If it's implemented as a local rapid transit service by way of electrification, then a midtown GO line should have more stops. I would add ones at Royal York, Runnymede, Keele, Dufferin, Birchmount and Neilson in addition to the ones shown: Kipling, Spadina, Yonge, Millwood, Don Mills, Sheppard, and Markham.