In the latest scans, we are now revealed about OOO's third full form, the Sagorzo Combo! Sa coming from the Sai Medal (Rhinoceros), Gor coming from the Gorilla Medal and Zo coming from the Zou Medal (Elephant) these Core Medals came from the Greeed, Gamel. On the scan above you, you can see OOO Sagorzo Combo fight against Yoroi Musha Kaijin, a monster that OOO will fight in the upcoming Movie Wars Core film.
On the following scan, we saw his abilities, these abilities are:
The ability to control gravity (Hence, we will see a floating OOO in the future!), super strength and the ability to create magnetic fields.
The ability to create earth shattering stomps. The Zou legs can deliver a heavy drop kick which can easily destroy the enemy, this will be called, Sagorzo Kick!
And my personal favorite, the ability to do Rocket Punches (Mazinger Z reference, FTW!).
OOO Sagorzo Combo is said to premiere at the end of the year. Probably around episode 13-15. On the latest scan above, he is said to face the Butterfly Yummy.
UPDATE: Placed more background info.