Edit: Something else I'm not sure has been mentioned: I think you can see the volcano in the footage. Right near the end when Link rides around the rock with the "deer" standing on it, there is a mountain in the distance with a yellowish cloud above it and a very orange crown.
My analysis so far:
Okay, so I was combing the footage for more details and was trying to place that gigantic bridge at the end. At first I thought it might be a bridge indicated on the map crossing a wide section of river, but then I noticed that Lake Hylia appears to have a bridge bisecting it down the middle exactly like Twilight Princess' Great Bridge of Hylia. It's faint but visible.
When facing towards the bridge you can see Death Mountain slightly to the right of it. When they turn further right you can see the tower they marked on the map and the sun. So I believe they are facing north looking towards Lake Hylia with Death Mountain in the distance and the sun is rising in the east behind the tower. Ahead of them is cliff and beyond it you see a glimpse of water. The lake is a huge gorge like in TP.
Also ignore the in-game arrow on the map. The map is from way earlier in the demo when they were east of the tower, before heading west and riding the horse around. The demo began at sunset, they ride the horse around during midday, and they reach the bridge at sunrise. It's not from the same time as the location I'm comparing to the map.
Some people were having trouble seeing the bridge. It's hard to make a good screenshot of it because the best view they get of anything but the closest tower is through some trees, but here:
You can see the span and the tower on the other side.
It's also probably worth noting that the tower of the bridge doesn't appear to be properly textured yet and uses the rock texture:
At the beginning they never look at Death Mountain. The mountain you can see is directly ahead of them in line with the beacon they place:
So not very far to the right of this line. Most likely the mountain I circled here. Ignore the one I crossed out.
Also, the body of water northwest of the arrow and beacon doesn't appear to have a bridge. It has a road leading up to it, and that road has a bridge crossing a body of water south of it. The multitude of islands in this water tells me this is probably a swamp (edit: more likely Zora's Domain):
They're also very far away from Death Mountain at the end of the demo. Being northwest of the marker would put them right at the mountain's foot.
This is pretty much the only place on the map where this view is possible. They can see the bridge to their left while riding towards death mountain along the red line with the camera angled to the left. When they reach the edge of the lake, a huge cliff, they veer right and run along the edge along the blue line. Straight ahead they see a tower. This could be a different tower, but even with just the bridge and Death Mountain this is the place it's gotta be.
They actually spent a lot of time in the Lake Hylia area:
When Miyamoto points out the apple trees they are actually riding on the same path they are riding on in the final clip when heading towards the bridge but in the opposite direction. In the last clip they ride towards the bridge, turn around, and then come up on the same area where Miyamoto pointed out the apple trees heading toward the statues where they fought the bokoblins.
Here is the path I think they took in the demo:
- They start out where the green arrow on the map is, obviously. Facing the tower and the tall mountain in the northwest corner of the map. They jump off northwest. Sunset.
- They reach a cliffside with a torch near a body of water. They are pretty close to the tower. They find Epona. I think the torch may be the tent icon on the map. Still sunset.
- They ride along a shallow pond and then around a massive forested plain. If they didn't mess with the time of day it took a while to get here because it's midday.
- They ride up a hill while talking about swinging a sword. A tower is in the distance, possibly the same tower. Aonuma wants to go someplace where he can find enemies.
- They arrive at the dungeon area south east of the bridge across Lake Hylia heading away from the bridge, implying they crossed it. They fight some enemies here. It is now sunrise.
- They ride through a narrow forest path. Can't really place it. If it's shortly after the last clip then it is still sunrise and based on the shadows they are heading west back towards the lake.
- They go back towards the Lake Hylia bridge, then turn back around and head towards the dungeon area, then end the demo.
For 3 and 4:
That's gotta be where it is. We see the same mountain from opposite sides, indicating we are west of it. In the last scene of that area they look ahead and see Death Mountain in the distance and then turn right and they see the eastern split mountain in the distance across a shallow pond.
Based on the landmark land formations I'd say he's just past the forested area near the oblong lake where the tent icon is where he finds epona. The torch is probably what that icon represents, probably some kind of waypoint. The tent icon has a #1 next to it indicating there are multiple. Perhaps you place them yourself and they allow you to fast travel/respawn at them. They're like a campsite to save progress. It would be a pain in the ass if you get killed and have to respawn back at a town or something. Instead you respawn at the nearest torch. Maybe even have a scene where Link packs up camp
You know, Aonuma was talking about how Hyrule Warriors influenced this game and he talked about how interesting it was to take control of areas. Lighting these torches could be a similar concept. Lighting the torch means you've basically claimed that area as safe.
Honestly I wouldn't be surprised if reaching the tower from where they started only takes a couple of minutes. Still, it's a big map.
This structure sure looks interesting. They veered the camera away as soon as they got a clear view of it.
Just in case people are having trouble seeing it:
Start: magic meter full.
After cut: magic meter drained a bit.
Magic meter remains drained for rest of demo.
You can see the stripes in the meter change when it drains.
I'm thinking the E3 shot is ALSO the big central plains. The mountain that's split in half isn't the same one we were looking at before, and if you look at the map there's another one that fits the bill on the west side of the plains.
Link is somewhere near that green dot, imo. It puts him far enough away from Death Mountain and gives him a clear view of it and the western split mountain. Plus it has mountains to the east that would block his view of the eastern split mountain which is why we don't see it and from the footage we can see that Lake Hylia is bordered on the eastern side by high hills that block view of that from this location on the map. It's north of a wooded area that we know from this demo to have ruins and rocks with symbols on them like in the E3 footage. It also has a river where the bridge scene could take place in that same area.
The black circle is Hyrule castle, which is between the western split mountain and Death Mountain. There is a bridge over the river indicated on the map in that area and I believe that this bridge is the castle town drawbridge ala OoT. In fact, I agree with Enduin that everything lines up with OoT. That place I thought was a swamp is Zora's River leading up to Zora's Domain.
Credit to Enduin for pointing out the similarities to OoT:
