I know, I mentioned it twice myself that I'm aware of the fact that they're not showing anything regarding the story. That is not my point/concern. Imagine starting OoT in Kokiri Village and being able to walk directly into Ganon's castle. Or waking up in Clock Town, climbing the Clock Tower and confronting Skull Kid without ever having to see the rest of the game, not knowing anything about the Giants or the other races etc. Or starting on Outset Island, immediately getting the boat, sail and Wind Waker, sailing directly to Hyrule Castle, past the Pupeteer boss and straight to Ganondorf himself. Good for speedrunners, yes, but not necessarily exciting if possible by accident.
Wind Waker is a good analogy I think. If it were possible to start on Outset Island with all items that are necessary to traverse the world already available and only given the hint "Maybe you should head to the Forsaken Fortress", then inadvertently collecting the Triforce pieces and Orbs while exploring the world, it would be a much worse game.
I would guess that even if you can do that, that something prevents you from completely doing it.
Like some Barrior at Hyrule Castle that needs to be removed first, or only the Master Sword able to damage Ganon.
Something like that. I mean heck we see that Hyrule Castle has some huge weird pink flowing stuff all around it. I'm guessing its like Twilight Princess/Ocarina of Time and that you can't enter until you fulfill some objectives.
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I'm kinda hoping there's more interesting shine designs. Maybe ones that are more dangerous and longer, because the two showcased were boring, even for a first dungeon. I DO the part where you encounter some gaurdians, and choose whether or not to fight them, use thier attacks to make you a shortcut your destination, or sneak around them. If this design is used all over, then damn.
Here are two more that are more complex. The first one pretty easy, imo still, but the second one, I can see a lot it not being kid friendly.