It is a very long shot, yes.
But...
You would not need ALL of those teams to lose two games.
There will be two teams in the title game, Team 1 and Team 2. Let's say Oregon wins out, and remains undefeated. That puts them in the title game as Team 1. That means Minnesota would have to edge out the other three. Also, remember that the main concern is losses in conference games only. Minnesota has only 2 losses in the B1G. And Ohio State already has one B1G loss.
Here are the remaining games for the teams we would have to beat out in that scenario:
OHIO STATE: at Penn State, Purdue, Northwestern, Indiana, Michigan
INDIANA: at Michigan State, Michigan, at Ohio State, Purdue
PENN STATE: Ohio State, Washington, at Purdue, at Minnesota, Maryland
Oh, and Iowa would have to lose one more game, because they beat us head-to-head. Yikes.
Those other three teams do have to play each other. Somebody has to lose in each of those head-to-head matchups. AND, Minnesota has the opportunity to inflict a loss on Penn State.
No matter what, Minnesota has to win out, though. That's a very tough assignment.