Hmm I just gave a read to that last article, and there's some more new casting announced, including Kiara. I just looked up the actress, and she's 34, which means Kiara will be an adult in TLG. I'm glad about that ^^

Additional cast members include: Eden Riegel (“All My Children”) as Kiara, Sarah Hyland (“Modern Family”) as Tiifu, Madison Pettis as Zuri and Jeff Bennett as Zazu (both from “Jake and the Never Land Pirates”); Andrew Kishino (“Star Wars: The Clone Wars”) as Janja, Vargus Mason (“Sofia the First”) as Cheezi, Greg Ellis (“Star Wars Rebels”) as Mzingo, Khary Payton (“Teen Titans”) as Rafiki, and Kevin Schon (“The Lion King’s Timon and Pumbaa”) as Chungu and Timon. “The Lion Guard: Return of the Roar” is a production of Disney Television Animation.