Since Drakken Joe and Shiki have displayed their Complete Overdrive, I think it would be awesome if Rebecca, Homura, Weisz, and Kris & Kleene to have their own respective Complete Overdrives in the future. Of course like Draken Joe said, each of them should push their Ether to its critical point, thus changing to their physical appearance into a different form
For example, I can see Homura viewing her Complete Overdrive as a substitute for Battle Dress: Valkyrie Armament System since she is the human member of the Four Shining Stars and successor of Valkyrie Yuna; or Weisz further enhancing his Arsenal Suit into something more powerful and stronger than the previous model with his Complete Overdrive.
I can't wait to see what's in store of Mashima showing us more Complete Overdrives in EZ manga. :D
What do you guys think?