A diagram of the marvel universe and many realms can be seen in the new movie, Thor: The Dark World.
Many Marvel references are found in Dr. Selvig’s chalkboard
Kyle+Yost = X
Kyle and Yost are the names of the creators of the Marvel character X-23, a girl created from Wolverines DNA.
The Fault/Crossraods
The Fault is a reference from Doctor Strange, who send the Hulk there. It is a unstable rift in space. The Crossroad may be a strange collision of space systems created by the Crossroads.
616 Universe:
Marvel recognizes there are parallel universes. Universe 616 is where most stories take place.
9 Realms:
Here you can see the main planets of each realm, including Earth and Asgard.
The Dark Energy Universe:
This is a place of reference in many Marvel comics. Some monsters come from there, and it may be close to the negative zone, where Galactus was sent in Fantastic Four 2: The Silver Surfer (which is better explained in the comic Ultimate Destruction.
Fractal Gateway:
This may be the connecting path to other universes and realms.
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