"Don't bet on it"
It is very unlikely that the Army will abandon the King. And even more unlikely is that Kathmandu falls to the Maoists.
And what's the likelihood that the King of Nepal will declare himself an absolute monarch and eliminate democracy, throwing the leaders of the elected government (including the anti-Communist Prime Minister) in jail, abolishing all civil rights, and using the bogeyman of "Maoists" to try to eliminate all political opposition, including from the anti-Communist majority? I'd say it's slim... except it already happened.
I don't think the Army with continue to support the King... I frankly don't think he'll be alive at the end of the year. This is a guy who shares a lot more in common with Kim Jong Il than he does with a legitimate anti-Communist, except he lacks Kim's social skills and charm.
What is it with the useful idiots comparing the king to Communists when he is actually the one fighting communists? First he's Pol Pot now he's Kim Jong-Il. Next they'll compare him to Mao himself. They sound like Nation magazine or something savaging Chiang Kai-Shek or Fulgencio Batista. Delusional parlor pinks always have to twist the enemies of communists into the bad guys to try and justify their communists sympathies. When the maoists start building their pyramids of human skulls in Katmandu, it will still be all the kings fault, though, not theirs.