I wanted a game which is basically an arena type game, the concept will be an arena simulation.. You don't get to control your character directly, you get to affect their destiny. You get to form their history and their lives up to that point, down to race, where they lived, how they were brought up.. What kind of values they have, what kind of training and martial arts styles they have.. Etc.
It's like Dwarf fortress in the sense that everything is calculated, height, weight, physical appearance and fighting style. Everything will be determined by how you trained them and what they value in life and focus on during a fight. The more fights they go through, the better and more rounded they will become. If say you spent you last three fights fighting exclusively boxers (Who all three would STILL box differently than each other, do to personal preferences and their capabilities/experience) your character will learn how to counter boxers better. The martial arts learning system will be built to be dynamic, you will get to choose fundamental ideas (Somewhat vague-ish ideals that will be the base of your fighter's personal fighting style) like "Observe and counter" "Remain calm" "Attack unpredictably" etc.. Your fighter can develope a favorite/core fighting style but you can build upon it and hybrid into other styles, this will happen naturally through fighting or directly if you choose to learn a new style.
You will get to choose through the usage of percentage sliders how much focus you want on the different styles that get worked in.. But the percentages don't appear until you learn a certain amount within a specific style, say.. Having one or two moves from Tai Chi will not make you a Tai Chi fighter, it will just round out your other style a bit more.
Animations will be built on the fly, much like Spore was originally intended to be (I imagine EA forced him to rush the project and to water it down to get the "E" rating) with no two jabs looking exactly the same, as height, distance, health and many other factors coming into play.. Essentially: If your jab would look a certain way in real life under certain conditions, it will look that way in the game.
Obviously this will be a 3D game, and the tech may or may not be there yet. This is something that's been in my head for a while.