I anticipate 1 of 2 results:
1) trump wins, globalist neocons begin to colonize the Democratic party, a subset of Bernie voters move to the Republicans.
2) trump gets a plurality but not enough delegates to win the nomination. disaffected Trump and Bernie voters start a third party and the Republican party withers away.
Either way, we end up with a nationalist party and a globalist party that more accurately reflects the central political issues of our time than the 20th century left/right divide that makes less and less sense.