I would think that if the fighters only move on one axis, you could use a script that could take the, say X positon, of both characters, then find the midpoint, and set the camera’s position using that, and zoom out as needed.
check games/tutorial post above… i have the arena camera script youre looking for… its rough, really rough! but if you need something better ill make it… the nan fighting demo has a perfectly working camera, ill try to get it that good