Apart of Top Ranking, there's something pretty telling:
The first summary for the next movie is released. Translation from Adamant, from pocketmonsters.net
Source:
http://www.pocketmonsters.net/main/news/2109
However, Adamant think this:
In reality (and now i think it's pretty clear), Ash and Pikachu are going alone for the entire movie.
The question is, why Serena, Clemont and Bonnie are not going to be part ?
Speculation: Some of those characters could leave early. Having a movie where 80% of it is Ash and pikachu alone has the sensation that those characters are going to be irrelevant after the movie.
I had the sensation that Clemont, Bonnie and Serena are going to pay the lower popularity of XY. It also doesn't help that Clemont may be useless after the Clemont's Gym battle and that Serena has had a drought for so long that when they she started doing something, it was too late.
I think that Ash is still popular and has had great writing in XY.
And I think that XY will ened properly, because, even if they actually losing money:
-For dignity. Given that the anime has been in the air for so long and that the games is still popular (although OR/AS is more sold outside Japan) it makes little sense to (at least) not end the XY saga.
-I think that for the anime to end, they had to stop airing Get TV and close the majority of Poekmon Center before even thinking of dropping the anime entirely.
-it may be defeated by Youkai Watch almost every week, but at least it's supposed to still have better ratings thsan the things of Naruto (although that's ending soon), Aikatsu, tamgotchi, Gundam, Yu-gi-oh, Card Fight, etc (many of those shows are lucky if they get a 2.