Found this article on TSN today:
http://tsn.ca/nfl/story/?id=350461
I am starting to think though that the Argos can coexist with an NFL team. The Bills series really hasn't affected them at all. The seasons don't overlap that much, if the Argos can share a better football only stadium at Downsview and if people who buy NFL tickets must buy Argo tickets it could work.