Clearly one of two things will ultimately occur:
1. A right wing Israeli government will eject non-citizen Arabs from the land either by settlement, starvation, or ejection. Then Israel will annex that land. This can only occur because everyone else implicitly authorizes it. This is the most likely scenario.
2. An international military coalition will invade and impose a military occupation like NATO did to the Balkans in the 1990s. This is easier than it sounds from a military perspective because Israel is small and simple to isolate. Just like Israel isolates the occupied territories they too can be isolated just the same. It’s only challenging from a political perspective.