Mega Diancie Box coming Jan. 14
Update: The release of the product sellsheet corrects the release date to February 4, 2015.
Another TCG promotional box will be available in January 2015. The Mega Diancie Box, to be released Jan. 14, will include a special Mega Diancie-EX promotional card as both a Jumbo and regular sized card, a Diancie playmat, Diancie pin, and 5 booster packs. No image is available at this time.
The promo originates from the Japanese Omega Ruby & Alpha Sapphire Launch Special Pack: M Diancie-EX containing both Diancie-EX and Mega Diancie-EX, though the English box only features the evolution card. Thus, the regular Diancie-EX card will need to be released by the time the Mega Diancie-EX promotional card is made available.