Ohhhhhh Mega Shiny Gyrados from Lysandre. The opening wasn't lying, Alain will side with flare. Looks like some good Serena moments and Zygarde cores forming together to create perfect? This whole arc seems to be happening in Lumiose but we don't see Alexa or Blaziken Mask in either of these previews sooo. Clemont looks like he'll win against Xerosic and pushes the button to deactivate the weapon. Ash being held captive by the laser or? Lysandre is also wearing his crazy DR Oct suit
Seeing Clemont crying in that scene, i don't think he pushes the button to deactive the weapon, but to shut down Clembot.
But whatever happens, i don't care anymore about YXZ.