I found a simulator in which you can select teams from different years (or the same year) and see what the line would’ve been on a neutral field. Obviously it’s all moot because none of the games happened, plus they only take in account the stats of the year, not the overall records. Here’s how since 2017 would’ve shaken up.
2017 : ISU (-20.5) 94%
2018 : ISU (-7.5) 74%
2019 : ISU (-4.5) 65%
2020 : ISU (-29) 99%
2021 : ISU (-3.5) 61%
2022 : ISU (-4) 62%
Again, none of this matters, because we’d only have seen Nebraska in a bowl game, but even that would’ve been impossible because they literally couldn’t make one.
Aside from the Nebraska/ISU angle that's a pretty cool experiment.
So many matchups to explore.