It has been asked before. Yes, it will happen, count on it. The game engine was designed with this in mind. But only after the single-player game is completable and released on iOS and PC, and after important features are added (mage and crafting)
Details are not clear yet, as it's still months away from even starting, but my intention is beginning with a cooperative options to explore dungeons with other players as party members. Too early to discuss more.