That may be true, however with it being on the pack's art probably says it will be in the set as some sort of EX and full art. Putting its new availability aside, I would also expect it to be an EX and full art because it's another mascot of the movie, thus making it odd for it not to be in the set as an EX and full art. The blister doesn't really say too much about Magearna's appearances in the English TCG, however considering that Mega Audino and Zygarde EXs received no full arts because they lacked them in Japan, you may be right about that it may not receive any sort of EX and full art forms. I still think and hope it will receive an EX (and full art more importantly).