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 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.
Marvel recognizes there are parallel universes. Universe 616 is where most stories take place.
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.
This may be the connecting path to other universes and realms.