The new photo from virbank is also not an official source, and is more unverified speculation.
Regardless, this simply isn’t how licensing works with Nintendo. Legend Maker was release in China, and was imported by Pokemon USA. Literally the worlds largest manufacturer (China) didn’t manufacture the cards.
More specifically, the current company that owns the Master License for pokemon is only allowed to produce certain plush/figures. TCG is off limits. No type of card is allowed whatsoever.