Some of the cast need some extra combo strings to toy and play around with. D’Vorah and Kano are good examples of this.
More 3D era characters. I’d enjoy seeing what modern NRS does with someone like Fujin, Ashrah, Nitara, etc.
A barebones hitbox indicator within the training mode. Give us something so we can actually see and lab the wonky hitboxes, developing strategies around it.
A remake of an old iconic stage in UMK3. The Pit was my favorite! Also, lets get some creative stage fatalities while we are at it. It would be hype to have a stage fatality on Tournament by throwing them into one of the arcade machines.