Iowa/OSU is actually mildly interesting to me. Right now Iowa kind of looks like what I've been afraid of - they were never going to embrace offense to the degree necessary to be great, but it does look like they have the usual elite defense with the solid running game they used to have in the mid-2010s. Their throwing numbers are still really bad, but I'm curious just how good the running game is and OSU will put that to the test. OSU is going to win easily, but I will feel better about Black Friday if they're able to completely stuff the run in that victory.
Normally I'd consider Iowa State a decent test, but they were only good instead of great against the run last year and they let UND and Houston run it pretty well on them this year.