Summary: It looks like EOJ Legend is already promised to have further expansion after its release.
The price and date is still to be determined, but the digital instruction on the EOJ Legend demo list following expansions on its way.
Expansion 1 5 cards set including Ninja Master Hanzo
Expansion 2 5 cards set including Son of Death
Expansion 3 5 cards set including Black Chief Iana Reed
Though there is no guarantee, I believe these are addition to the 30 new cards that to be added to EOJ Legend. I’m still not sure charging money for just digital copy of cards, but nonetheless, more cards planned for future is always good news for TCG. Though it is stated as expansion, there is also wording “booster pack” so not sure if these will be random assortment vs. fixed set of 5 cards.