Mark my words the Indians will annex Nepal as soon as Nepal becomes just another dysfunctional Democratic-Republican country. Nepal already has large madhese population so they would happily go back to become part of India.
I think the biggest tragedy would befall on the Pahadis(Bahun-Chetri), if that is to happen. So India needs to be broken up BEFORE Nepal becomes a dysfunctioning democratic-republic and annexed by India.
Indian states such as Uttarakhand and Himachal Pradesh should be independent country and Nepali Pahad should join them for one Pahadi country, called Pahadistan or Parvatestan. We have our own race culture and language different from the desis and the bhotes. Mongol people of Nepal will unite with their Sikkimese and Bhutanese brothers to form the Bhotiya country. Madheshes will unite with their Bihari brothers to become the Madhesh country.
Look at my projected map.