We know next to nothing about the content of the TV series. However, Aria's (Ducky's) mother Melody mentioned in a mail to some of us that Aria auditioned for a character named "Ovie", not Ducky. We can only guess here, but if they stick to the tradition of naming land before time characters after their kind Ovie may possibly refer to an Oviraptor, an eggeater. Keep in mind I'm just speculating here.
Aria's mother also mentioned that they are looking for a voice for Chomper. If Chomper returns, so might the eggeaters Ozzy and Strut, maybe along with another eggeater called Ovie. But like I said this is just speculation.
Another fact however is that (again) they are looking for a new Littlefoot. I sure hope that after all they find a good sucessor to Thomas Dekker.