Originally Posted by MovieMasterCBM
It's not the Mind Gem. It was said so in the movie and the music used when it was used, and the way the energy looks, is reminiscent of the Tesseract. I'm certain an Infinity Gem is on Earth anyway, and Thanos sends an army (Skrulls?) to go get it, and if SHIELD don't give it up they'll destroy the planet.
Avengers 2 is gonna be so ****ing awesome.
I still think the Gems are already gathered neatly inside that nifty little glove Odin keeps on display in Asgard. Unless you completely discount all the appearances of the Gauntlet in the Thor movie, in the Kevin Feige video interview, and the SDCC display, it's already a done deal.