True, The Land Before Time TV series should've come out in the 90's like Fivel and An American Tail did. It would've been a hit, however I doubt we would've gotten so many sequels, it could end up having the same fate as Dinky, the Little Dinosaur, two or three seasons and then it would be forgotten to all eternity. In this day and age I don't see the TV Series as a good investment, it would be targetted to a very young audience, since most kids these days spend more time playing videogames or in social networks, a series like that would have to be to 3/4-year-olds.
I was excited for the TV series, and yes, it did something that the movies, besides V, never did, it brought back a lot of the guest characters.
Still, I would rather have more TLBT sequels with more profound stories and that invested in the mythology of the franchise by bringing back some of our most beloved characters like Ali and Mo. Even Tickles and Guido could pop up if it was justified.