A new 3.52-kilometre street circuit in downtown Markham creates significant uncertainty ahead of the inaugural race, with limited practice and no prior data on the 12-turn layout producing tightly bunched implied probabilities across more than two dozen entrants. Championship leader Álex Palou, Kyle Kirkwood, Scott McLaughlin, Christian Lundgaard, and Pato O’Ward head a deep field whose recent consistency, qualifying pace, and street-circuit experience translate into comparable win chances on an unfamiliar venue where walls punish errors and strategy often decides outcomes. The even distribution of probabilities reflects trader consensus that any of the top contenders can capitalize on clean air, pit timing, or traffic management, while lower-priced options like Jacob Abel and Katherine Legge face steeper barriers on a temporary course that rewards adaptability over established form.