Frost Mage said:While it is going to be a supported format, it won't be the "main event" per se, and won't be the main focus of most competitive discussion, I'd assume. It still sounds fun though, maybe I'll turn my RayBoar deck into RayEels when Rayquaza EX goes out of format.
I think building decks will be easier, more and fun, and cheaper in the second format, but the original format will most likely remain the most popular as you said.