Serena vs Aria Kalos Queen Battle

Will Serena become the new Kalos Queen?

My real question is, if Serena DOES become the Kalos Queen, what will happen? Will she have to stop traveling with Ash?

Is the episode after the battle against Serena and Aria legit?! (it doesn't sound possible)
Episode Title:
A Bride for Citron!? Eureka's S'il-vous-plait Panic!!
Citron=Clemont         Eureka=Bonnie            Si'l vous plait= Please