Does the Dominican Republic want Haiti? I don't think so considering how hard they are on Haitians who try to go to the DR part of the island.
Will the USA take on Haiti and make it a second Puerto Rico? I don't think so; for one, it would be expensive; two, all the Haitians would move to the USA as soon as they could; and there are probably other reasons as well.
So my analysis shows that Haiti will remain a barely functioning country as it was before and it will not "end". After all, Bangladesh has it bad every year due to the extensive flooding and naturally occurring arsenic in the groundwater; but they still exist.