Who knows, it is on the 15 year plan, but no details at all other than they want RT on Steeles.
From Pioneer Village to Dufferin is industrial and commercial lots, so ROW should be able to squeezed in, hopefully with the same likeness like the Highway 7 BRT. Problem areas could be the residential frontage for example between Yonge/Bayview and Warden/Kennedy. The bus lanes and stations would probably have to be on the curb because of the lack of space, and may take the space between the existing road all the way up to the sidewalk. Not a lot of space at all, but I think it's doable. Or else, the buses would run in mixed traffic with special restrictions. The buses would have to merge into mixed traffic anyways for Barrie and Richmond Hill line bridge and Highway 404.