WJBK has more than just an agreement with the FOX Network. They are in fact owned and operated by the FOX network, so it's not as though this would be case of a franchisee dickering with corporate.
I won't argue that there's no way the Tigers end up on 20, 50, 38, or anywhere else instead. I'll even agree in the interest of maintaining comity that it might even be more likely they end up on channel 20. All I would maintain is that if FOX were to agree to air the Tigers on their O&O again in 2026, as they did last season, they would not relegate the broadcast to a dot-two.