It depends on who wins, how big they win and when they win.
If they win in 1948, no Israel.
If they win in 1967, much smaller Israel with the rest partitioned between Egypt, Syria and Jordan.
If they win in 1972, like 1967 but probably goes nuclear and may trigger WWII. The Israel's probably have nuclear weapons by this point.
There really have not been any that pushed Israel hard enough to risk their existence since 1972.