I am a fan of robots and was hyped by the infamous Rise of the Robots (& Rise 2).
Rather than copying every other fighting game, why not be a bit more realistic regarding robotics, and metal and damage. I am fan of Robocop & Terminator films and loved the Robocain model.
How hard would it be to rig up robots, and the game aim is to beat each other & wrestle each other to a pulp, in realistic robotics terms. This means they are based on hydraulic power/strength, and metal armor. They either have a CPU brain or human brain. Armor damages like normal deformation from a car crash.
A lot of the failures of original Rotr was due to limitations of gaming hardware & the fact they are ripping off from other fighting games. It would've been cooler if it was more of robotics & metal simulation game.