NW wins 17-7 and takes the tiebreaker atop the Big 10 West.
With games remaining against Michigan State (1-3), Minnesota (2-3), and Illinois (2-3)...Wisconsin would need a whole lot of help in Northwestern losing to 2 of those 3 teams (not to mention Wisconsin winning out isn't a guarantee either...they still play Indiana).
So it sounds like a pretty certain bet at this point that this year's Big 10 Championship Game is going to be Ohio State vs Northwestern. (And everyone be honest, wouldn't all of you have just loved the 2020 weirdness if this year's Big 10 Championship Game (in football mind you!) had been...Indiana vs Northwestern?)