UN forcing a Palestinian state could be the absolute best thing that would happen to Israel. It would relieve Israel from any humanitarian or economic responsibility towards the Palestinians (they are nearly 100% reliant on Israel today), legitimize military operations in retaliation for terrorism and most importantly, would end the "right of return" concept and once a state is declared, it would also end any so-called legitimacy for Palestinian violence against Jews.
For all the reasons above, the Palestinians will not let this happen. Nethanyahu knows that one way or another, he wins; if a state is forced on him, he could evacuate settlements on that mandate, however if the Palestinians backtrack and not declare a state, the international opinion would turn against them for not taking the opportunity to end the conflict.
Likewise, Abbas is an exactly inverse position: take the country and he will be marked a traitor who given up the collective dream of the great Palestine, built on the smoking ruins of Israel; and he has climbed too high of a ladder to just back down without a good reason. He already hinted he wants a way out of this mess.
I predict there will be a softened call for recognition of the Palestinians, not a state but some kind of upgraded international status. The Palestinians would blame that on the US call for a veto - and back to the usual programming.