I had an idea for a 3d fighting game similar to Garouden Breakblow: Fist or Twist. Just like in that game if you hit an opponent it wouldn't stun them, which lets you and your oppent to beat eachother simultaneously, until some threshold will be met and some get stunned. You can move freely on the ring including diagonal directions, which would make it different from Tekken and allow for much more tactical positioning play. Both these things will make a game more realistic, which I always wanted, yet didn't tried in UFC or WWE or other irl sports type fighting games because their setting is realistic. Speaking of game mechanics again, I want my game to have a meter filling with each succesful guard or attack, that can be unleased as an ultimate attack which requires a specific combo setup first.
A roster of characters is all over the place cuz it supposed to be a multiverse, so there would've been cyborgs, humans, medieval swordsman with a magical imaginary sword, space jail prisoner, gigantopitecus (3 meter tall monke), demon (3 meter tall monke, but bald, blue and spitting fireballs), levitating orb with tentacles, a dude who can teleport, etc. These characters are divided into 4 categories by the ammont of their health with "big" having 125% of health, "enormous" having 200%, "average" is 100%, and "small" is 70% or something like that.