Looks like the 4th expansion to the Pokemon XY TCG series in Japan has been announced. “Phantom Gate” will feature Psychic-type Pokemon and have M-Gengar EX as the expansion’s mascot. It will be released in Japan on September 13, 2014 and have at least 88 cards. Check out the sample Japanese advertisements below.
According to the advertisements, there will also be a 60 card theme deck called “Hyper Metal Chain Deck” which looks like it will feature Dialga-EX and Aegislash-EX. There will also be Mega Gengar sleeves and a Mega Gengar deck box.