Yes, you can watch all the Warner Bros. films on HBO Max in Canada by using a Virtual Private Network (VPN).
There are movies like The Suicide Squad, Space Jam: A New Legacy, Tom, and Jerry, Mortal Kombat, Matrix 4, and Godzilla vs. Kong which are scheduled to release in 2022.
All you need is an HBO Max subscription and a VPN to connect to a server in the US or any other country where HBO Max is available and then you can watch all the content on HBO Max including Warner Bros. films.