I'm fine with the Missouri series, just have issue with the 1-year overlap in 2026 with the conclusion of the Duke series & the start of the Missouri series. Imho, Illinois Football doesn't need to be playing multiple power non-conference teams in a single regular season ever again.
Anyways, I found the official Future Schedules page on fightingillini.com, it appears to be up-to-date fyi-
https://fightingillini.com/sports/2015/6/24/football_futureschedules.aspx
Football Future Schedules
fightingillini.com
Brief history of current/future power non-conference series-
Kansas series (away 2023, home 2024) - announced in
January 2014, setup by former AD Mike Thomas.
Duke series (away 2025, home 2026) - announced in
June 2015, setup by former AD Mike Thomas.
Missouri 4-game series (home 2026 & 2028, away 2027 & 2029) - announced in
November 2017, setup by AD Josh Whitman.
Missouri 4-game extension (home 2032 & 2034, away 2033 & 2035) - announced in
March 2020, setup by AD Josh Whitman.