It's official: Deck Adventurers Heroes of the Valley will be the continuation of Deck Adventurers Origins, and will be available, foreseeably, at the end of 2021.
https://store.steampowered.com/app/1682240?utm_source=stm_da-or_upd1
The main news is an important change in the combat system, since the characters will now fight on a grid, turning Deck Adventurers into an interesting hybrid of tactical turn-based combat, while preserving its essence of a card and deck building game.
Also, the story will continue right at the point where its predecessor ends, so if you haven't already: Let's go! Complete Deck Adventurers Origins!