The college football extended universe is something a fiction writer could only dream of creating. Star Wars never had a side plot as worthwhile as the BYU-Utah Holy War. The Buffyverse was never capable of something as unexpectedly rich as the Grand Valley State-Ferris State rivalry. (And I say that as someone who married a distinctive Anya type.) J.K. Rowling only wishes she could create something as lasting as the feeling of telling people what it was like to watch Auburn's Bo Jackson, UNLV's Randall Cunningham or Missouri's Brad Smith in person.
Some people are content with focusing on their team and their tailgates.