> Would people let anything go, or would there be rearming and escalation and a full on continental war within a decade?

well they are re-arming/escalating now so there's no difference there

> They have to commit and reach a peace deal which hopefully involves Russia helping to rebuild this area

I don't see that as feasible. Reparations like that is a good way to get hostilities to continue.

>. Zelenski won't let this happen.

Zelenski is a problem but the bigger problem is Putin/Russia/PMC Wagner/Belarus. Once those 4 behave themselves, Zelensky can be dealt with