Well, it is likely the US will be involved with aggression from at least two of these, but I would be very surprised of a unified offensive involving all three.

Well, it is likely the US will be involved with aggression from at least two of these, but I would be very surprised of a unified offensive involving all three. China hasn't had expansionist engagement outside its own border disputes for some time so exactly where Iranian, Russian and Chinese forces will cooperate isn't clear. If China invades Taiwan that will be a distinct event unlike any Middle Eastern ballistic missile fed fiesta. Maybe the headline makes more sense s/war/wars/