For the sake of starting a discussion, and also because I'm curious, having noticed a few things I never did before:

Maybe I'm not being observant or something, but where exactly were the entrances/exits to and from the Great Valley in the 6th movie? In the other movies it seems like we get a clearer idea of how the Gang enter into the Mysterious Beyond, whether by accident or on purpose.

2nd movie: The gang accidentally break open the rock wall, which becomes and entrance to and from the Mysterious Beyond.
3rd movie: I actually haven't seen this one in a long time, but as I recall, the Gang lead the adults to the Mysterious Beyond where the water got trapped. (I don't think it showed how they got there.)
4th movie: Another one I haven't seen in a while, but I don't think they ever actually said anything about the Mysterious Beyond in that one. We know that Littlefoot goes to the Land of Mists, which also makes me wonder if they consider anything beyond the Great Valley the Mysterious Beyond, or if the Mysterious Beyond is considered a certain section of the dinosaur world (I highly doubt this, and think it more likely that they consider anything beyond their home as the MB.)
5th movie: Again, leaving through some unseen exit.
Alright, maybe not all of these are clear, but it makes me wonder.

The entrance and exit into the Great Valley in the 6th movie wasn't clearly defined, and I guess it could just be that they didn't show it - same as they didn't in 3 or 4.
But they encountered sharpteeth near Saurus Rock.
Maybe the Great Valley has hidden exits/entryways, or maybe it's a simple matter of climbing over a large wall - one that tends to block sharpteeth from entering the valley. Grandpa Longneck and the Gang seemed to do a lot of climbing over rock walls when they sought out Littlefoot in the 6th movie. But I couldn't help but wonder.

Am I over-analyzing? Probably. XD But I love analyzing small things.

Also, does Doc only save longnecks?
Offhand, that might be a stupid question, seeing as how he technically helped save not just Littlefoot but Grandpa Longneck and the other members of the Gang toward the end of the movie.
But in the flashbacks he's only around other longnecks and saves those longnecks, and also only ever seems to save Littlefoot from a few dangers. (Yeah I know they did it on purpose so as to make Doc shine all the more in Littlefoot's eyes - but let's ignore that for just a moment. XD )
Personally, I'm sure he would save any dinosaur who was in need (leaf-eating dinosaur, specifically.) But I'm interested to hear all your thoughts on this. ^^;

I read on The Land Before Time wikia that Petrie's dad and Pterano make an appearance. There's a picture, if you scroll down to the gallery, with two Pterosaurs that someone seems to think are Pterano and Petrie's dad - yet on Petrie's wikia page, it states that his father is never seen, even in the original movie.
Even so, I'm curious to find out. What episode do these two flyers appear in? Below the image, it says something about a "Hidden Canyon," but I don't recall ever hearing about this place. XP
Can anyone tell me?

http://landbeforetime.wikia.com/wiki/Pterano

I don't know why I've been on a Rinkus obsession lately. Feels like every time I watch the LBT series, I get attached to a new character. XD
Anyway, I was watching The Stone of Cold Fire the other day and noticed something I never noticed as a kid: Rinkus holds his tail a lot. I got to wondering why, and figured that maybe he used to hold his moms' tail as a baby, and that he derives subconscious comfort out of holding his own tail. Memories from being a baby, and all. So I made a pic depicting it.



Then I did another one with Rinkus and possible childhood siblings.
I figure him to be the type who didn't get as much attention, not being overtly aggressive (more like passive aggressive, at least as an adult.)



Sorry if they're too big! I don't know how to re-size them... D: