Which one side or the other would declare terminated for nonperformance by the other side, perhaps while suing for breach.
> and one way or another, everyone would get a stay on everyone else
If by a stay you mean an injunction preventing a change in the arrangements, it seems unlikely that "everyone would get a stay on everyone". Likelihood of success on the merits and harm that is not possible to remediate via damages that would occur if the injunction wasn't placed are key factors for injunctions, and that's far from certain to work in any direction, and even less likely to work in both directions.
> and nothing would happen for years except court cases
Business goes on during court cases, it is very rare that everything is frozen.