I know they're placeholders at this point, but I like the hyphenated station names.
University-Queen
Yonge-Queen
Queen-Sherbourne
King-Sumach
Eastern-Broadview
Queen-Pape
Gerrard-Pape
Danforth-Pape
Although the fact that the line is partially N-S and partially E-W makes it challenging to be consistent with station naming here.
For the N-S portion, the names make sense to me with the cross-street followed by the street the line is following, therefore Queen-Pape, Gerrard-Pape, Danforth-Pape. The important part of the station name is which cross-street you're passing so it goes first. The second part is important because overall for the line it shows you what street the station is running under.
However for the E-W portion of the line, this isn't always the case.
The portion along Queen does have University-Queen and Yonge-Queen, but then switches to Queen-Sherbourne, King-Sumach and Eastern-Broadview, which in my mind should be reversed and named Sherbourne-Queen, Sumach-King and Broadview-Eastern, putting the cross-street first and the less important info (the street it's running under at that point) second (here, Queen, King and Eastern).
Of course, that's how I would name the stations.
You could also go the other direction and name the street being travelled on first, and then cross-street, the way LA does ("Wilshire/Western", "Wilshire/Vermont", "Wilshire/Normandie"; "Hollywood/Western", "Hollywood/Vine", "Hollywood/Highland").
If we did that then we would end up with:
Queen/University
Queen/Yonge
Queen/Sherbourne
King/Sumach
Eastern/Broadview
Pape/Queen
Pape/Gerrard
Pape/Danforth
Actually I kinda like the LA way...