Thanks for your point of view, half the people share this view, the other half share the view that they can get back something and that's all they are focusing on.
This stash could be tied to Vinnik, btce, associates, it's currently unknown who they are planning to go after, or how directly the bitcoin is tied to the hack
They are working on contingency, meaning if they don't recover, they don't get paid (from what I am understanding). However, there are other risks, like signing documents and handing over all personal info, besides giving away a majority of whatever may be recovered. So far a lot of speculation - they have yet to release an official statement publicly, only using intermediaries so far.
Unless they're going through law enforcement or the Mt Gox creditor I don't see how it can have any legitimacy.
Vinnik is still buried in extradition stuff. BTC-e is dust. If Vinnik, or anyone else, does have any coins they will be handled by whatever court they're convicted by, not predatory lawyers who turn up out of nowhere on the internet.
They are seeking mtgox creditors to give them the rights to pursue the bitcoin on their behalf. They are saying they are going to be working with law enforcement/courts? who knows. No additional useful information has been provided. This is Russia after all so we can't discredit the amount of fuckery possible.