Yes, three carriers (2 US and one French) are already there. Nimitz will make four.
And this time, there will be no question about Europe pulling away from us, etc. The Iranians took British hostages, the French are already there, and Chirac is swiftly approaching the end of his Presidency, and has nothing to lose by taking on the Iranian problem (remember: Iranian-supported groups are keeping the Syrians in Lebanon, and the French don’t like that).
So, this time if it happens, it will be a Western operation. Russia won’t like it, but they’ll be isolated without Europe to help. And China...well, China’s economy is dependent on that oil coming through the Straits of Hormuz, so if things go South there for a bit, the Chinese are going to take a nasty blow.
Roger on the effect on China. The economic impact worldwide will dictate events in the Middle-East for the forseeable future.
My read on it includes Russia as one of the good-guys too. They're steadily becoming a capitalist society, and, like China, a Nuclear-armed Iran is bad for business (A Nuke N. Korea's bad too!).
And both China and Russia have had bad experiences with the evil that is islam. I think they'll both be in on the kill when the end-time for islam begins. It's just good for business! Stay well and safe ................ FRegards