Does it Make Sense if Serena gets a camio in Alola? I mean, Ash is no longer the same Ash she admires (He is now turned into a comedy gimmick, and is rarely seen pursuing his dreams). The gang is made up of six people and it is impossible for her to fit in such a large group. and there are no...
tbh her popularity will keep on decreasing as time goes . Amourshipping is not a canon, but has the most chance to happen. But if Ash never wins a league and keeps continuing his journey; after a decade or so, Serena and well as amourshipping will become more and more unpopular.
I recently did a poll on Google Plus Japanese pokemon community. It may have less votes but here is the result:
In west, her popularity is still big, we have a 735 member amourshipping community on G+