There is strong suspicion it may be a play to get Vinnik extradited to Russia, based on creditor's damages files with Greece.
Like a missing piece of a puzzle, other than a potential money grab or a scam, this one could be the reason why this proposal/firm is still being shilled for more than a day or two since their first announcement.
Here is a coindesk article from yesterday?
https://www.coindesk.com/for-desperate-mt-gox-victims-long-shot-bitcoin-deal-beats-endless-waitseveral other law firms were contacted and were not interested in dealing with looking into this matter.
Unfortunately, there is no one in Russia to take lead on this situation.