As I mentioned above, we're hosting Michigan in 2025 and returning the visit in 2026.
After that, we've got a bunch of holes in our OOC schedule, due to having to cancel scheduled games with Tennessee, Georgia, Bama, and LSU. After the Michigan series, we don't have P5 OOC opponents until Nebraska in 2029-2030, and then not again until Clemson in 2035-2016.
I'd like to see us schedule some old Big 8/Big 12 conference-mates. And some former Pac-12 schools probably have the same problem with holes in their OOC schedules as well. It would be good to get USC, U-Dub, or Oregon lined up for future series.