I recall seeing a PDF for Sunnybrook's master plan which involves adding a 6-8 story building on their current parking lot outside M-wing. All I can find now is just a photo of the proposed building on this
site. Not sure if they'll retain parking at that location, but as a Sunnybrook employee my self, parking is expensive and limited.
fortunately the various busses (124, 11) make very frequent stops at the hospital but given the enormous size of Sunnybrook, a proper LRT or subway station is greatly needed.