Well, I know that it is just an idea but when you unlock the arena decription in the Krypt for the Drum Arena then there is something written that the biggest drummer of the level ("Konga"??) will fight if there will ever be a draw match!
What do you think? I tried draw matches in versus mode and in arcade mode in the drum arena but there was just a laughter and then I restartted from the main menue with the MK:DA title.