What will be left? The same power structure and malevolent culture that already exists, minus some of the brains.
I believe the last few rounds of brain drain out of Russia have helped to leave their scientific, aerospace and military programs in the relatively dire condition they are at present vs the Soviet past (emphasis on helped, there are other factors such as eg Ukraine no longer being part of the USSR, with Ukraine being an important contributor to various Soviet accomplishments). It has net weakened Russia considerably in my opinion, that's a good thing, until or unless their culture changes.
The ideal situation for the American ruling class is to simply import highly skilled workers from other countries, rather than produce them at home. This alleviates the domestic burden of paying for a truly world class education system.
For the past decades, it already felt that the main exports from Russia were a) fossil fuels, b) organized crime. What else does Russia provide the world?