If there is a Canadian bid, and a big IF as I know nothing, it is probably from Maple Leaf Sports and Entertainment (MLSE). Last year their CEO and CFO visited Saint Mary's amongst other clubs, and there were rumours in Canada at the time that they were interested in purchasing an English club.
http://www.thestar.com/comment/columnists/article/417801
They may see Saints as very attractive at the current price; an asset they can grow. Would be amazing for Saints as MLSE is a billion dollar enterprise focused on sports teams. (Toronto Maple Leafs, Toronto Raptors and Toronto FC).
There is also a slight Southampton connection as former Saint Jim Brennan is the captain of Toronto FC.