What's something you saw in a movie or show or read about in a book that you started wishing was incorporated into a video game? It has to be something that doesn't already exist in any existing video game.
I personally am still hankering for the ability to feel like I'm legitimately using real martial arts to manipulate the elements of water, earth, fire, and air like they do in Avatar: The Last Airbender and The Legend of Korra. You might say that there are three games for the former series and one new game by Platinum for the latter series that would allow me to do just that, but those are all based upon a combo button layout fighting system/action adventure thingy. None of them fully replicate the great choreography of bending, both in terms of visuals and in terms of gameplay.
I personally am still hankering for the ability to feel like I'm legitimately using real martial arts to manipulate the elements of water, earth, fire, and air like they do in Avatar: The Last Airbender and The Legend of Korra. You might say that there are three games for the former series and one new game by Platinum for the latter series that would allow me to do just that, but those are all based upon a combo button layout fighting system/action adventure thingy. None of them fully replicate the great choreography of bending, both in terms of visuals and in terms of gameplay.