Thor appears in the Iron Man 2 trailer

Holy Asgard golden gate! This is the real thing! and accompanied with a twitter post that confirms it all!

http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs498.ash1/27173_403463231317_621251317_4804531_1222879_n.jpg
Chris Hemsworth as (could be) Thor in a cameo appearance in a French version of the featurette and  trailer
watch the featuertte below, he appears at around 1:30
watch that trailer here