So me & Dirtbag Daryl have been discussing and debating over who could fill in for the remaining 4 characters in the image originally posted by Ed Boon on August 29th of last year.
UPDATE: Gamer68 has corrected me on the 5th leg, who I originally thought was Kano. With that being said, it's probably Jax/new character
The second foot seems to have some type of light attached to it, and you if would look above the leg you can see some type of cloak (or at least the shadow of it). We predicted that the character this leg fits best is either Kabal, Ermac, or a new character.
Moving on to the last leg, we can infer that it's some type of weapon. I thought it was some type of double bladed weapon or a Naginata, and when I thought of Hotaru immediately when i seen this, but the possibility of him being in the game is slim to none. We predicted that this it's either Hotaru, a ninja or a new character.