It's weird especially since T.J. usually appears in cartoon voice work, as he reprised his HTTYD character in (what I assume is) both series, and also appearing as Robbie in Gravity Falls.
Though, I always found it strange that in the Tarzan cartoon Wayne Knight's character was voiced by Jim Cummings when Wayne was already a regular cartoon VA, especially since he was Evil Emperor Zurg in Buzz Lightyear of Star Command a year at least before.
I am surprised by the return of Maya Rudolph, though.