Michigan State's dramatic, thrilling, whatever adjective you want to use victory over Michigan is the first of three big puzzle pieces that fit into who will represent the Big Ten East division in the conference championship game, but if the two other pieces fall a certain way, there could be some controversy.

Assuming Michigan, Michigan State and Ohio State when the rest of their games they don't play each other and the two big games left go something like this:
Ohio State over Michigan State
Michigan over Ohio State
There is going to be a problem for Big Ten fans and fans of these schools.

In this "What if?" scenario OSU, MSU, and Michigan would all be 7-1 in the conference. According to the official Big Ten tiebreakers they would fit every single level of a three team tiebreaker as equal and the result would go down to college football playoff rankings.

From bigten.org:

"(b)    If three or more teams are tied, steps 1 through 7 will be followed until a determination is made.  If only two teams remain tied after any step, the winner of the game between the two tied teams shall be the representative.
1.    The records of the three tied teams will be compared against each other.
2.    The records of the three tied teams will be compared within their division.
3.    The records of the three teams will be compared against the next highest placed teams in their division in order of finish (4, 5, 6, and 7).
4.    The records of the three teams will be compared against all common conference opponents.
5.    The highest ranked team in the first College Football Playoff poll following the completion of Big Ten regular season conference play shall be the representative in the Big Ten Championship Game, unless the two highest ranked tied teams are ranked within one spot of each other in the College Football Playoff poll.  In this case, the head-to-head results of the top two ranked tied teams shall determine the representative in the Big Ten Championship Game.
6.    The team with the best overall winning percentage [excluding exempted games] shall be the representative.
7.    The representative will be chosen by random draw."


Tiebreaker number five will most likely be the tiebreaker to separate these three team and while it may be considered better than a random draw it still could lead to some major issues begin taken up by the fanbases of two of the three schools involved.

Again, this is all a gigantic "if", but it is certainly plausible and after Saturday's game the old adage "Anything can happen" is certainly in play here.