Several pieces of (possible placeholder) boxart and five new screenshots of Skylanders: Spyro's Adventure have turned up at Amazon.com. If the release date is also accurate then you can expect the game out on Xbox 360, PlayStation 3, Wii, PC, and the Nintendo 3DS on September 27th 2011.
Toys R Us also have the boxart and a bit more detailed descriptions of the contents of the Starter Packs which will include the game (obviously), the Portal of Power, 3 figures (Spyro, Gill Grunt and Trigger Happy), poster, 3 trading cards, a sticker sheet, and 3 web codes. Hence the large shape of the box.
I'm not saying it looks good, but it looks better than I originally thought. Spyro sounds awful though. I also watched a bit of the trigger happy video, and I think the other characters could ruin it quite a bit.
I saw the "Spyro Starter Pack" trailer and I HATE Spyro's new voice. Good(!) He sounds fits how he looks. The Hans Zimmer music so far is okay-ish. Spyro's not even on front of the cover (instead, a green guy with blue hair).
Let's I'll find a little bit of that TRUE Spyro magic a little bit in the upcoming Final Fantasy XIII-2 and SoulCalibur V.