Spoilers for Agents of S.H.I.E.L.D.
Throughout Agents of S.H.I.E.L.D. Season 5 and 6, the location known as the Fear Dimension was used in a huge way. It influenced the 100th episode as well as the main plot behind Season 6’s main villain, Izel. My theory is that the Fear Dimension could instead be a Planet in a distant or non-distant solar system. The main evidence behind it is some dialogue that Sarge and Izel say of course. Sarge mentions that he traveled between “worlds” and not “dimensions”. This isn’t exactly reliable because Sarge was messed up in the head the entire season but was he says still holds some merit. Izel, although, is a very good source of information. When we first see her she is going around the galaxy in search of some technology, the monoliths, that presumably her people made on her world. The monoliths specifically manipulate elements of the main dimension that we follow. It would make sense that the monoliths wouldn’t be able to manipulate the elements of a different dimension. Along with this Izel referred her world as a realm and that word isn’t usually used to talk about different dimensions. More of different worlds, like Thor and the Nine realms. Anyway I just wanted to bring this subject up because of the wiki the Fear Dimension is shown as a different dimension and not a different world. I just wanted to start up the topic