nfitz
Superstar
You could easily run a replacement streetcar (with several possible loops) from Exhibition Loop to West Harbour hitting all the stations. And then you can use a replacement bus from West Harbour station to Don Valley station that effectively combines the 25 and 72 buses, but only stopping at all the station.They could run extra streetcars from Exhibition along Queen to West Harbour, or less, but yes the other downtown routes will be able to provide several alternatives.
Though I have been on a Line 2 replacement buse that was also stopping at the regular (non overnight) stops on Danforth.