Loki will be asleep and his mind will be a crossover between three worlds: Jotunheim, Asgard, and Titan.

It's basic landscape will be like what we see of Asgard with the exception that it's fragmented like the place we see in Avengers (which I say is something like Titan). Pieces of it are shattered and spread through a space of nothingness. There's no light save for the stars. To make it worse, it's all frozen. Extremely cold.