While it's not clear when the next Mortal Kombat game will come out yet, its release should lead to a major change for Mortal Kombat 1. As it stands, Mortal Kombat 1 already has a decent amount of content. It provides the expected single and multiplayer gameplay modes, while also having a few new features like the Kameo system and rotating Invasions seasons. Even so, it's inevitable that the game will one day reach the end of its lifespan. When that happens, there's one move that the developers could make that should do wonders to make fans happy.