All it takes is a judge willing to entertain the FSIA exceptions, some of which are arguably applicable...first claims have already been filed in Florida and Nevada on behalf of private individuals seeking redress for economic harm. Someone will need to make an appearance on behalf of the PRC, and oh, if you ever got to the point where there are damages, maybe having a bunch of state-owned enterprises with assets in the USA wasn't such a good idea? It's a long-shot for sure, but there are plaintiffs law firms in the US already laying the groundwork, compliant members of Congress who are interested in broadening / confirming the FSIA exceptions and other legal avenues, and think tanks that are already publishing supporting theories that will undoubtedly be well-cited.