Recently, two new leaked images were posted on 2ch's Kamen Rider OOO rumors section. It pertains to Kamen Rider OOO PuToTerano and KoraKaWani combos. These are two unconfirmed combos heard from the hacked OOODriver.
Kamen Rider OOO PuToTerano Combo have a purple color scheme. OOO needs to utilize the Pterodactyl, Triceratops, and Tyrannosaurus Core Medals from the Dinosaur Greeed, Giru. If the image is real, the head would be the Pterodactyl, not the Triceratops (Ukiya: Which doesn't make sense, IMO) as oppose to the first rumors. It is rumored that Kamen Rider OOO PuToTerano combo is kind of dark and possibly meaning it's an unstable combo, resulting in a berserk form.
Kamen Rider OOO KoraKaWani Combo, on the other hand, is the reptile combo and will be using an orange color scheme. To be able to use this form, OOO needs to utilize the Cobra, Kame (Turtle), and Wani (Alligator) Core Medals from an unknown source the Reptile Greeed, rumored to be called Iiba. It is first rumored that these core medals are man-made, possibly by Kougami, or some other Greeed that will be introduced later in the series.
Please do take rumors with a grain of salt.
Source: Netarider