Originally Posted by Crassus
If the tesseract is the space stone, then it could be acting as a conduit to draw power from the other stones from across the universe. Energy from it for the Hydra weapons could be drawn from the power stone, and Loki's staff could be channelling the mind stone through the Tesseract.
Interesting concept....I like it.
If it's true, it would mean that Thanos has the Mind Stone already, accounting for three of them (Mind, Space, and maybe Power for Aether...?).
I still think CATWS would be a logical place to put the Time Stone, since an already observable theme deals with the past versus the present.