After reading the script for the movie, I noticed that in one of the Earth scenes the Warriors Three & Sif would be joining Thor in New Mexico. So I went back to the official trailer, and sure enough there they were in all their "beaten up after battle" glory.
So it intrigued me enough to make a little "fan made" poster just for fun in the Paint program. I tried to make it the best high-res I possibly could.
Enjoy...................