hydrosharp_98
27/02/96
As WhiteBlair said, a "longer" story isn't going to increase the file size on its own. What I expect is bulking it up so much is the sheer volume of areas to explore, which obviously have to be modeled and textured and whatever else goes into making it look nice. Each part of the map has some unique feature or other, which is another model, another texture, more animations. I've said it before, but it is relevant here too: Alola is clearly making far, far more use of the fact that we aren't hemmed in by two planes of movement and square sprite tiles anymore. Kalos used it to a degree with places like Lumiose, but in Alola they are clearly using this - combined with dynamic camera angles - to allow us to see every inch of each island. I mean, the islands have sides and backs to them that we actually see! This is unheard of in a series of games where previously almost everything you could interact with had to be facing south, and a tall building might as well be a brick wall for all the depth that was possible. Whereas previous regions were basically a series of small maps linked by those waypoint houses, it genuinely looks like we can visit every corner of Alola (except maybe the open sea). That is amazing. And it's also very data-intensive. Of course, this does lend itself to a longer story, but then Unova was a big region and the eastern third of it wasn't involved in the main story at all. Not saying that's bad though, as I do like lots of postgame content. It just shows that a long story can take you backwards and forwards through the same areas, and a short story can skip over them, so there's not necessarily a linear relationship.
Like I said, I'm aware a longer story doesn't affect file size. What does is the fact that, from what we've seen thus far at least, Alola appears to be much larger, at least in depth, than any region we've visited before. As far as I'm aware, and at least what I was referring to, is that the "main story" refers to the typically 15/25 hour period between the beginning of the game and the "ending", where we become regional Champion, or this region's equivalent. The main story appears to have more depth, appears to be spread over the entirety of Alola, and seeing as, due to the updated graphic engine and appearing size of Alola, will be one of, if not the, longest main stories in a main series game.
If you checked back to my original comment or read what I'd said, though, I state that.
Story =/= increase in file size.
Updated graphics => increase in file size.
Updated graphics and engine capabilities = larger (feeling) region = increase in file size.
Hence, a longer main story. Just clearing up what I had said in my earlier post.