If the Ukraine crisis gets any worse, the whole thing could stir into a full scale war, possibly even World War 3! If that happens, so many Russians will be forced to flee their homes.
I imagine the state the Russian economy is in makes them desperate for foreign currency, but if things get worse in Ukraine and sanctions get tougher it's not beyond the realms of possibility that Russian ballet companies will no longer be welcome.
But surely the West wouldn't force ballet companies to stay away since they have nothing to do with all this...
Well, the Mariinsky still has plans to go to the Segerstrom Center in September and just last week announced they will be bringing Raymonda to the Kennedy Center in Feb. 2016. Also, ABT just announced Shklyarov and Sarafanov are taking over a few of Hallberg's performances this spring. Also, the Eifman Ballet is coming to City Center in May. So despite great tensions, I don't think it will affect Russian companies/dancers coming here unless things really badly deteriorate.
Actually, the the big drop in the ruble is making St. Petersburg look like kind of an attractive place to visit (of course, mainly for the ballet). If only the visa requirements were not such a pain in the neck. But we've been semi-seriously talking about it, especially now thet winter seems over.