The Shrine

I'm not a huge fan of fighting games but I do play them a good deal. One thing I noticed is that I can't think of a fighting game where you actually have any kind of freedom in the Z axis, at least if it exists I don't know of one that was successful. By flying I don't mean like a Dragonball Z game where you walk on an invisible floor in air. Now I'm sure there are design/control issues to make such a game, but it seems like you could make something that might look like say, Virtual On. There are FPS mods with no gravity and they seem to at least be workable/playing, so why not fighting games?