Exactly. The fact that we are discussing the possibility of it here is proof that it is disputed possibility. Bitcoin is an open source protocol and will be changed to whatever the users want it to be changed.

I suppose it is more of an inherent question of what defines "bitcoin" and some purists believe that we can never stray from Satoshi's original consensus mechanism, while other purists say we must see the forest for the trees and define bitcoin as the currency which follows Satoshi's original philosophy and if another algo accomplishes that than this is also acceptable.