At 1:13:56, a picture of the Tesseract is seen (as a Schlegel diagram). In the Thor, Captain America, and the Avengers, the Tesseract is a device of unlimited power, left on earth by the god Odin, of Scandinavian lore.
Director Jon Favreau said it himself: "If you look at those maps, each one of those locations corresponds to something in the Marvel Universe."
In the scene where Tony Stark is about to make the new element for his Iron Man Suit, you can see Captain America's shield. Captain America is another Marvel comic that is being made into a movie in 2011.