According to this story, the Illinois Supreme Court will soon decide the lawsuit Collazo v Illinois State Board of Elections. The issue is the 2024 law that eliminated the ability of qualified parties to nominate after the primary (in races in which the primary didn’t produce a party nominee).
The Illinois Supreme Court has one of the worst histories on ballot access of any court in the nation. An Illinois Supreme Court ruling kept the Harold Washington Party off the 1990 ballot, but fortunately, the U.S. Supreme Court reversed it, in Norman v Reed. The Illinois Supreme Court upheld the law that required newly-qualifying parties to run a full slate of candidates, but later the Seventh Circuit, a federal court, struck it down. The Illinois Supreme Court has consistently ruled against the ability of citizens to use the statewide initiative process. The Illinois Supreme Court kept Henry Wallace off the ballot for president in 1948.