Anna's Russian Aria album is utterly spectacularly Mind-blowing. I would love to hear her singing Russian folk songs. Hvorosotsky has an album like that which I thought was quite successful, but I can't imagine anything more magical than Anna singing Russian folk songs.
You are absolutely right! Nevertheless, this will be a piano recital, rather than a concert with orchestra as in the Russian Album. So, we may have as reference the recitals she gave in Salzburg and Berlin, among other sites. A few days later she will give another one in Wien, most likely with the same repertoire, with Barenboim at the piano. A join album of russian melodies by Anna and Dmitri would be a must!