I got bored and started to pause The Avengers every minute to look at something. I found the scene where Nick Fury is giving Steve Rogers the file on the Tesseract. Very interesting stuff, but then I found that it was printed in the Phase One box set (that I didn’t buy and had to find a scan of on the internet). So here it is:
Interesting. There’s some redacted parts. Well, it just so happens that those lines are the only lines that you can see in the movie.
“…how they want to be used, and deny certain wishes. Mephisto has proposed that a billion-sentient universally-linked will could overcome this problem, and that the Cubes could be as powerful as the Infinity Gems.”
Assuming Joss Whedon isn’t trolling people and that this is serious, this implies the SHIELD has come into contact with Mephisto (which would be interesting for Doctor Strange in 2016), that there are multiple Cosmic Cubes, and that SHIELD is aware of the Infinity Gems.
If that’s actually the case, perhaps Nick Fury has a deeper motive for gathering the Avengers than I had thought.