thorkizilla:

SO, HEY, DO YOU WANT A REALLY TERRIBLE THOUGHT?

According to the AOU artbook, the visions Wanda gives them are of their greatest fears and Heimdall tells us what that basically is for Thor:  That he’s a Destroyer, that they’re all dead and Thor was the one who led them to Hel.

His fear is that they’ll all end up in Hel and he can’t save them.

And then we see this figure:

Our mysterious cloaked figure that popular money says is our missing Loki cameo.  

THINK ABOUT THAT FOR A MINUTE.

PART OF THOR’S GREATEST FEAR:  THAT THOR COULDN’T SAVE HIM AND NOW LOKI IS IN HEL.