I touched on this a little in a previous post, the smoke one. What if there were combos that incorperated special abilities like teleporting for one....
Maybe one combo he juggles/throws/uppercuts the person into the air and puffs away in a cloud of smoke and appears to catch the person in mid-air or elbow/kick/double axe handle the opponent into the ground for extra damage(must be difficult to pull off)...
Possibly have Scorpion uppercut someone into the air and throw his harpoon into the person, in mid air to pull them into the ground and possibly continue it, but if you mess up there is a lag or the combo won't have as much damage.
I can't think of any others at the moment, but imput on this idea might be nice... later