Ok, Chomper has already been established, but we'd need to find a way to introduce Ruby for everyone that didn't see the TV Series so that everyone who hasn't seen it won't go "Who the heck is she?"
They are going to have to explain what Chomper and Ruby are doing in the Great Valley if they mention them in film XIV. On the other hand, if they don't, it will create possible confusion for those who have seen the TV Series. It seems that they are caught in a Catch 22 that would best be resolved by them finishing the TV Series up properly and mentioning Ruby somehow so that when they bring her back in a film, people will at least have some idea who she is even if they've never seen the TV Series.
(Note: We'd need to do the same if Rhett ever returned, as he might if Ali ever comes back. Like Chomper, Ali is really popular and might well come back some day.)
