http://www.toonzone.net/forums/cartoon-network-cartoon-forum/291412-cn-schedule-updates-110.html#post4522561>Beginning Monday, September 15, Pokémon The Series: XY will air weekdays, replacing Adventures in Unova and Beyond.These weekday slots were the only place BW was airing until recently. As of the 15th, it will finally be off the airwaves in everywhere that matters.
This also means that the dub is changing its theme song soon, since weekday slots are only given to seasons that have completed their "run" of 40~ episodes.
