There are 2 connecting paths from the NB side to the SB side of Queen Stn.
One is inside the fare paid area, one is outside the fare paid area.
Both partially encroach on what would be platform space of any Queen subway.
They are side platforms.
There is some additional space beyond the locked doors but not a ton (given space for tracks).
The video I've linked above is with formed TTC CEO Andy Byford and Brad Ross and includes a section shot in Queen Lower; that begins at approx. the 2:55 mark.
This diagram shows how placement of the elevators at Queen , which don't encroach on prospective platform area; but the access corridors to them do.
View attachment 271349
The above is from:
https://www.ttc.ca/Subway/Stations/Queen/Accessible_Alternative.jsp
Steve Munro concurs this will be a challenge.
He will have more to say on his blog later today.