If they had any interest in MAN they would of not waited until rouge happened to launch MAN.
Re-launch surely?
Bear in mind Air Canada served MAN from 1986 before going latterly seasonal and dropping the route at the end of summer 2007. They know the market quite well and aside from a one time loss making attempt in the mid 90s to use YYZ as a hub to connect to the US up against the big boys, they operated 5 x Daily with GLA in winter, it's been a leisure focussed route.
In the new Air Canada world, that's always going to be Rouge.