The Iranians and the Arabs can choke on it. India is a 3rd rate 'power' too cowardly to wage serious war. The worse the Indians can do is attempt to sponsor terrorism and cause a few explosions. Pakistani high command knows there isn't going to be a war from India hence their business oriented and relax attitude about everything. When the push comes to shove Chinese ships will dock in Gwadar.
The USA has left this region for the forseeable future. In the upcoming war the US navy will be almost entirely eliminated by the Chinese and India will be abandoned by the West for their failure to put up any serious front against China, that means back to the Hindu rate of growth.
The Russians might go full on doctrine mode if the Ukrainians don't settle for a peace deal. Once the NATO loses Ukraine, which will take a while because this is a long conflict now, the USA will withdraw from that sector also and focus on South China Sea.
This is where lines will be drawn. The ASEAN countries will have to decide on relying and joining the US led bloc against China and risk full on Chinese invasion after the US abandons that region also or try to stay neutral.
In the larger scheme of things, the South China Sea conflict is a given, the only factor unsettled is who will stand on which side.
Take part in a hot war against China and be abandoned at the end, or stay neutral or take China's side and push the US out of the region and ensure political and economic stability for the next 100 years.