In my opinion any conversation about Ukraine becoming or not becoming a member of NATO should not and will not be part of negotiations between Russia and Ukraine. A good negotiator never offers something they can't unilaterally deliver.
Membership in NATO requires unanimous agreement from every member nation, which is not going to happen right now for many reasons. Not to mention, how a country defends itself in future conflicts should not be part of negotiations aimed at stopping an ongoing conflict.
With Trump recently making it clear that Ukraine will have our complete support, (not holding back key weapons and key moments like the previous administration) short of American troops on the front lines, with a deal that secures our investment, Russia is suddenly more motivated than ever to take whatever they can get before things get much worse for them.
I think it will end with Russia getting a bit of nearly worthless land, then pulling back with their tail between their legs, leaving us with a strong partnership in the REM and oil business in Ukraine.
That's a win-win-lose deal that prioritizes America first. It will be another win on a long list of wins in a very short time.