Israel would agree to nothing.
Israel would agree to a deal if it was to its advantage and it got what it wanted. There has and continues to be ''behind the scenes'' talks between Israel and the Arabs and despite Israel perpetually declaring that it will not negotiate with ''
terrorists'', it has done so in the past and will do so again if needed.
First off, for anyone to sit across Israel, would mean she's recognised as a state - nope, didn't think so.
As long as Israel - in violation of UN Resolution 242 - continues to occupy land it doesn't own, no Arab state will be willing to officially recognise Israel [even if they did which Israel should they recognise, pre-1967 or post 1967 Isreal??]. The issue of the Arabs not recognising Israel has not prevented both sides from holding talks before.
Whether Al-Assad remains on power for another year or so or the opposition forces come in to power, the infrastructure of the country has already been destroyed.
The key question we should really be asking is what kind of post Assad Syria will emerge, given all the violence that has occurred.
And what will the response of the West be if the victorious rebels decide to be nasty to the Alawites, Christians, Druze and other monorities? Will NATO and Arab League troops enter the picture to protect these minorities - highly doubt it.
The West of course will off course demand that the rebels hand over Syria's stock of chemicals to be destroyed. But what if the rebels say that the chemicals are the property of the
free and democratic Syrian people and they will be maintained to safeguard Syria against foreign aggression and that as long as Israel has nukes and refuses to handover the Golan, Syria's chemicals will be needed as a deterrent.
As usual, with it comes to the Middle East, there are more unanswered questions than answers.