I would bet that TSN would get a good audience for re-broadcasting 2019 games. If I worked for them, I would surely propose it.
Thursday, they could overtake ‘Overdrive’ (expert analysis of the day’s biggest sports stories),
Friday and Saturday, they have plenty of room, especially with doubled up coverage.
For instance, they’re showing the Western Final again (second or third time?) on Friday, but at 2:30 Eastern time. I know they’ve shown it on July 3rd because they list that date as the original air date.
So that’s a space filler example.
If they advertised it properly, they’d get the audience.
As to the contract with the CFL? I’m sure there’d be no problem..