As I’ve said elsewhere here - NRL Broadcast Rights (2027-?) - #124 by bacco007 - it’s likely to be a significant challenge to unseat Fox with the NRL, thats not to say it isnt possible though.
Nine would have to put forward a very compelling offer. I suspect they’ll try in the next round - I’m interested to see if they bid only as a complete package (Subscription + Free-to-Air rights) or if they bid with the flexibility to accept Free-To-Air only if Fox retain the Subscription rights.