I examined every point spread available for future B1G conference games on sportsbook.com. I then filled in the unavailable spreads (either the teams aren't playing this year, or it's not an attractive enough game to post a line this early) by averaging their spreads vs. common opponents. Finally, I averaged each team's average spread relative to each other team's average spread, to determine a final ranking.
Here are the results
Wisconsin------Nebraska------------Ohio St------------Michigan St------Penn St---Michigan/Illinois------Iowa--NU
(0) (+1.6) (+4.9) (+8.2) (+9.9) (+10.6) (+11.9) (+12.6)
Expected point spreads for Northwestern's Conference Schedule:
NU (+5) @ Illinois
Michigan @ NU (-1)
NU (+3.5) @ Iowa
Penn St @ NU (pick)
NU @ Indiana (?)
NU (+14) @ Nebraska
Minnesota @ NU (a lot)
Michigan St @ NU (+1.5)
1. I assumed a standard 3-point home field advantage
2. I probably committed one or more basic statistical errors.
3. I didn't include the Indiana-Purdue-Minnesota crew because they had no betting lines available and are bad at football.