No. Team Flare will appear. With the opening revealing Ash meeting Alain, that will most likely bring in Team Flare. So they are probably about to appear soon. There will probably be an arc based around Team Flare, similar to what they did with Team Plasma in Unova.
Alain and Ash are in the same universe as Ash is mentioned in the Mega Special. And Alain is mentioned in the main anime. So they will probably team up together for a short amount of time to take down Team Flare. Lysandre mentions that he is about to start his plans and heads back to Kalos.
Alain and Ash are in the same universe as Ash is mentioned in the Mega Special. And Alain is mentioned in the main anime. So they will probably team up together for a short amount of time to take down Team Flare. Lysandre mentions that he is about to start his plans and heads back to Kalos.