Similar to James Bond films, the last line in the credits states that “Thor will return in The Avengers”.

We see Dr. Selvig (Stellan Skarsgård) meeting in an underground facility with Nick Fury (Samuel L. Jackson). Selvig says, “So you’re the man behind all this? It’s quite a labyrinth. I was thinking they’re taking me down here to kill me.” Fury responds, “I’ve been hearing about the New Mexico situation. Your work has impressed a lot of people who are much smarter than I am.” Selvig says, “I have a lot to work with. The Foster Theory. The gateway to another dimension. It’s unprecedented. Isn’t it?” Fury walks to a table with a large metal case on it and says, “Legend tells us one thing; history, another. But every now and then, we find something that belongs to both.” Fury opens the case, revealing the Tesseract/Cosmic Cube. Selvig asks “What is it”, to which Fury responds, “Power, Doctor. If we can figure out how to tap it, maybe unlimited power.” In a reflection of Selvig along the wall, Loki (Tom Hiddleston) steps into view and says, “Well, I guess that’s worth a look.” Selvig repeats, “Well, I guess that’s worth a look,” implying that he’s being possessed by Loki, then Selvig smiles.