However bear in mind Air Canada still operate a summer service to Dublin, Barcelona and Rome, if any STAR carrier was going to relaunch long haul, they might be the best bet on MAN-YYZ.
I remenber Air Canada CEO saying there will be no European long haul routes added until the low cost division of Air Canada is launched and the CEO said that LHR will be transfers to it and DUB will become year round. MAN would surely be looked at after that? but any further increases in APD could cause a problem.