I doubt that will be the case. The last kerfuffle about RTGs was with Cassini and it was mild. The society is way more connected now, and also seems to care less about some things. When the total life cycle is considered (and there's lots to consider; hence the energy economics study) nuclear fission wins by far because of its ginormous energy density and total output. Per unit of energy released, it causes the least damage to the environment. All power plants cause damage in some way. Even without that in mind, fission and solar electrical are not mutually replaceable, whatever the lying hippies say. They belong to totally different categories of energy production. Fission is sluggish and provides the base load, solar electrical is fast acting and can fill up peak loads... sometimes.