I assume you'd just demo it and start again. Preferably in a way it could be covered with a development. Shouldn't be much different than starting from scratch.
Though that raises the option of putting the Thorncliffe deeper, with the opportunity of developing it. Perhaps also giving them a park. There's certainly other cities where the garages are underground or covered over!
There's a difference between cancelling a project, and just tinkering with controversial pieces, like the yard location, and the above-ground segment through Riverdale.
Though Toronto-Danforth (Riverdale) is a safe NDP seat - so nothing to be gained there. But the yard is in Don Valley West, where the Conservatives lost in 2018 by only 181 votes - so if I were the Liberals, I would be making promises about moving that yard.
Ford is ahead in the polling, but they are significantly down from the last election in the recent (Leger) poll. The
current Canada338 seat projection puts the PCs with only 53 seats, compared to 45 for the Liberals and 25 for the NDP - which I'd assume would lead ultimately lead to a Liberal premier - which is what happened in 1985 when the results were similar. I'm not sure why you think that Ford's re-election is likely, even if he is the best choice for transit expansion.