Thanks for the replies folks.
5500TT with experience on 220, 320 and 787 (in training currently) at Air Canada.
Ideally would like to go to a legacy (Delta or United), but no replies from recruiting yet on the time limited visa question.
Hopefully they see my intentions are long term, whether through this extendable E2 visa or other means as time goes on (perhaps work sponsorships will start coming to these carriers as the assumed shortage gets worse).