Mango The Magician
Banned
If theories are correct, and we're in the new kokiri forest region, it really could be a repurposed deku tree. They match up, geographically speaking.
I really don't think that upper part is Gerudo Desert, as not only does it look like a desert, in the E3 shot, but in every game outside of OOT, it's always to the lower left (southwest) side of Hyrule Castle. Plus, I really want to imagine that white area, that is persumably really high up, as Snowpeak, and TP made a point to state that that is above the desert, to the left/upper left of Hyrule Castle. So, personally, I think Gerudo Desert is the "?" area on that image, while the area above it, going off how Zelda maps usually work, is just a bunch of mountains, and hopefully Snowpeak.
Here's TPs map to compare.
Of course, Death Mountains placement in TP is a little iffy, So who knows? I just really want Snowpeak! D: