I dont think korok seeds as a collectible will return, however, Hestu might return as an NPC and I would be a big fan of that. It also would be cool if he had a quest, where you would collect a very small amount of seeds in a small area.
I was thinking about this since botw released. I think the combat system definitely has potential for PvP, but it does not seem like a “Nintendo-thing” to do. What do you guys think about this?