I would be very surprise if Russia accepts anything that can be possibly proposed to them. As Soloviov said on his show: Soloviov is only half ironical.
This isn't even remotely true. Russia has clear goals and would accept an offer that helps them accomplish those goals. Obviously neither Ukraine nor western countries, except maybe Trump's America, are willing to do that. But there is a way to negotiate. However it requires a recognition of current realities and in my opinion a tit for tat exchange strategy. The problem is that Ukraine's negotiating position is weak. All this talk about Ukraine negotiating from a position of strength comes from a tacit recognition of this reality. Negotiate now and what can Ukraine offer in exchange for any return of territories? A realistic peace deal now could involve the conflict ending along the current line of contact. Russia gives up on further territorial claims, Ukraine recognizes lost territories as officially Russian. But Zelensky has stated that this is a red line he won't cross. I'm of the opinion that for Russia, freezing the conflict is a red line they won't cross. They want a permanent peace and they're not going to relinquish all or even most of the territories they've captured. So... they're at an impasse. Zelensky can't recapture the lost lands but won't recognize them as Russian. Russia won't take a ceasefire or a truce because they lose their only leverage to force Ukraine to accept loss of territories. That leverage is continuing hostilities, loss of further territories, further death and destruction. This is why I think negotiations are failing. And I think Russia's messaging to Trump is that he needs to get Ukraine to accept loss of territory. If Trump can force that, we might see an end to this war. If he can't, maybe because Europe is willing to back Ukraine without America, then I suspect the war will continue until either direct involvement from western military forces brings it to the brink (or even into) a nuclear war, or until Ukraine suffers some sort of large scale collapse, and western forces move in to secure parts of Ukraine while Russia grabs others. Other factors are at play too, Russia might suffer some sort of internal instability, possibly the death of Putin. This could change their direction. Then again it might mean nothing. A larger war with China or some sort of global economic crisis could undermine Europe's ability to support Ukraine and could force the sides to negotiate. Zelensky could die, or be deposed, and a new Ukrainian leader comes in willing to recognize loss of territory in exchange for peace. But barring any force majeure events, I think things will go down one of the two paths I described above.