GameXplain just posted their analysis of the trailers (and it has a Wizard reference!)
http://youtu.be/Ex6jLfChyPQ
They're terrorpins, not turtles
ALttP Artwork has a yellow band around his hat and brown sleeves, too. ALttP2 Link is wearing white tights, though.
It's been confirmed that the game takes place after ALttP.
The tree grows back every time you leave the screen.
Or maybe the buzz blobs just came back. This is a pretty big leap.
You didn't find an item in the Skyward Sword demo, either. The item of the temple was the beetle, but they gave it to you at the start of the demo. The demo also gives you the bombs, which you don't get until the next dungeon, and the bow, which you don't get until pretty late in the game.
The Fighter's Shield looks just like it did in-game in ALttP.
The Power Glove is not coming back. I was looking closely at Link in the 3DS trailer and noticed this:
It's a little hard to see in the youtube footage I pulled that screen from since it's so blurry, but Link is wearing a Power Bracelet. Its a gold bracelet with a red jewel, which is most similar to its FSA appearance; but it's been in several games, including LoZ, Oracle games, Link's Awakening, Wind Waker, and Minish Cap.