First of all, most likely it is using the mkda version. This doesn't mean that these characters are playable in MK:Dcptn. However, they may be playable in MK:Dcptn, only in "The Board Game". Just because their models are inputted in the board game as we have seen in the video, doesn't mean they can't be played with. So, by the looks of the video in the board game, when Quan Chi and Scorpion are right next to each other, and I believe that Scorpion has a status ranking of "Warlord", Scorpion most likely is the character that is being controleld by the user goes in battle against Quan Chi. And then from the board game mode, it quickly switches to a tournament mortal kombat arcade style fighting mode. That would be cool, playing MK and chess at the same time. Although it isn't chess, it is similar to it. So there's strategy in getting to your opponent on the field, and strategy in getting to your opponent in battle. Quite Nice I Must Say! Since the game is still in development, I can't say that some of these characters are only playable through "the board game" mode.