It looks like (AC) Air Canada *New* Boeing 787 Dreamliner 10 fleet of planes

will be based at Toronto YYZ 1st to support AC’s YYZ hub & international flights /expansion.
/CNW/ - With new, exciting routes already set to begin operating to South America and Mexico this winter from Air Canada's global hub at Toronto Pearson, the...
www.newswire.ca
Plus the AC 787-10 has lot of premium seats 42J 28W and 262 Y according to Wikipedia
https://en.wikipedia.org/wiki/Air_Canada_fleet
I’m sure as AC gets more deliveries of 787-10 they will rotate some of it to operate international flights from Vancouver YVR & Montreal YUL AC hubs & even on the Calgary YYC- London LHR UK route too (seasonally)

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I don’t think Edmonton YEG will see the AC 787-10 , unless AC decides to upgauge from YYZ

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