Steve did a good book on one of his favorite themes that being where humans and the wild intergrade and interact.
Hang Lee of the College of Veterinary Medicine, Seoul National University, and founder of the Tiger and Leopard Conservation Fund in Korea (KTLCF), said, “The study shows that it is important to examine the examples of coexistence between humans and big cats around urbanized environments, both in a spatial and temporal context. On top of this study, which focuses on the late 19th century, there are records of sporadic coexistence for more than 500 years in Seoul, from the 14th-19th centuries and throughout the whole Joseon dynasty of Korea, showing that big cats and urban citizens can live in very close proximity if certain conditions are met.”
This bit on Amur leopards in Seoul, Korea seems a good fit for that idea. Amur leopards are one of my favorite cats and were down to 30 in the wild, at one point. If given a chance, they would likely do well in Korea again. The DMZ has already proven to be a wildlife haven.
They likely would do very well in deer rich Saskatchewan, or even here. The trouble is they would not likely stay in place.