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How cool!

The same seller also has an early script from the original LBT film, too! With Littlefoot's name as "Thunderfoot!"

Wow, thank yo-o-ou a lot for pointing this out, Mu-u-ud Bro-o-other!
The fishy will amend my OP and add what you stated here. Also, I'll rename the thread to include the script for LBT 1 as you pointed out here as well.

There is also some points of interest that Mo-o-o is intrigued by. First of all, of course, as you stated, Littlefoot has his early name of "Thunderfoot" before they changed his name to what we know of today. Secondly, the title (fittingly) says "Land Before Time (Began)" which signifies the beginning of The Land Before Time franchise as know it. Thirdly, in the item description, one of the sentences says this:

An early working title for the film was The Land Before Time Began. Bluth, Spielberg and Lucas originally wanted the film to have no dialogue, like The Rite of Spring sequence in Fantasia, but the idea was abandoned in favor of using voice actors to make it appealing to children.

If this is true, it is quite a fun fact that Mo-o-o had no idea about. A movie having no dialogue would be pretty rare in the first place, right? Glad they went with the decision to have dialogue though, personally!

Fourthly, there are plenty of differences already as far as Mo-o-o can tell, between the final iteration of the movie and what is shown in the script. I invite everyone else to look at the photos at the link provided to spot them! I won't spoil it in this post.

How cool!

The same seller also has an early script from the original LBT film, too! With Littlefoot's name as "Thunderfoot!"