People are so worried about kovu that they're forgetting about Vitani. She was under developed in tlk2 but I feel she could be a better developed character in the tv series.
Kids (or speaking in tlk terms, cubs) rarely listen to advice from family members and I think timon and pumbaa will mostly be comic relief so why not have her be kind of like a mentor to Kion?
I am worried she will mostly be in the background or be forgotten. There is a glimmer of hope as Disney seems to be taking previous characters and nods to previous movies in spite of this show being mainly targetted towards kids who have never seen the lion king before.