Prepare to have your mind blown! I was watching Guardians of the Galaxy the other day and I was on the part when the Guardians meet The Collector.
While he was explaining the Infinity stones, it shows a picture of the Tesseract/Cosmic Cube. If you don't remember the Tesseract it was the glowing blue cube that appears in Thor,
, and The Avengers.
So this proves that the Tesseract is a type of Infinity Stone. This ties the world of Asgard into everything.
What do you think?