Serebii Updates: Pokémon Smash episode of May 19th to have Pokémon X & Y news from Masuda. Likely to come before serebii.net/index2.shtml — Serebii.net(@SerebiiNet) May 10, 2013

This is most likely related to the information that's coming from CoroCoro, so we could see the details hit as early as this coming Wednesday.