Since Reptile has become the Dragon King, do you think that this could make the MK Team want to bring the other Raptor back into the story? Think about these storylines for her;

Khameleon may want to take advantage of the fact that the last male of the Raptor species could become the new emperor of Outworld, and as his queen, she could help create and lead their species to power.

OR

Khameleon could be afraid that now that Reptile's the Dragon King, there could be no hope to re-create their species. Learning that he has de-evolved because of his prolonged seperation from the matriarch, and realizing that she's the last living female of the Raptors, she decides to join the Earthrealm warriors to see if she can return him to his normal Raptor-self and end the war without resorting to his death.