There you go. I have just designed a coherent structure for my sandbox about DC Cosmology. It's a basic structure; we can add information to it later. This approach may give the impression of a less vertical hierarchy and be more consistent with what some authors, such as Grant Morrison, have attempted to do.
The Structure of Existence: The Divine Continuum
The Spatial Aspect of the Divine Continuum: Omniverse
The Material Realms of the Omniverse
Structure of a Single Universe
Three-Dimensional Size
Spatial Dimensions
Temporal Dimensions
Total Number of Universes
The Antimatter Universe
Higher Dimensions
The Orrery of Worlds and Local Multiverses
The Bleed
The Subtle Realms and Liminal Structures
The Speed Force Wall
The Timestream
Wonderworld
The Metaphysical Realms of the Omniverse
The Elemental Realms
The Sphere of the Gods
Nature of the inhabitants of the Sphere of the Gods
Mortals and the Sphere of the Gods
The Collective Unconscious
The Godworlds (Urgrund, New Genesis, and Apokolips)
Heaven, Hell, and the Silver City
Skyland and Underworld
Dreaming and Nightmare
The Dark Multiverse and the Outer Place
The Temporal Aspect of the Divine Continuum: Hypertime
The Upper Boundaries of the Divine Continuum
Comic Book Limbo
The Monitor Sphere
The Sixth Dimension
The Source Wall and Promethean Galaxy
The Outer Realms: The Greater Omniverse
The Light of Creation and Primordial Darkness
The Source/The Overvoid/The Presence = God
Notes: The Bleed connects all dimensions across the Divine Continuum and extends beyond the Orrery of Worlds to other Multiverses. It interacts with higher dimensions such as the Fifth Dimension, which touches all levels of reality except the Sixth Dimension and the upper realm. The existence of the Fifth Dimension could reasonably be interpreted as being perpendicular to Hypertime, given that its inhabitants can traverse it freely and the nature of Hypercube Time, where fifth-dimensional entities observe us in the same way we observe the two-dimensional adventures of our favorite comic book characters: in a flat manner. The fifth-dimensional Gentry used Cube Time/Earth-33 to invade the Multiverse through infected comic books as carriers, and Bat-Mite could travel through Space B/Plane Time to penetrate reality.
A single universe produces an infinite number of possibilities and timelines which, in turn, generate an infinite number of others.
While parts of DC Cosmology can be understood as a vertical hierarchy where certain realms transcend others in terms of dimensional or ontological level, the overall structure is not strictly linear. Instead, some layers function more like intersecting systems or “axes” that interact across the cosmology. For example, the Bleed operates as an transdimensional medium connecting realities and dimensions, but it is also shown to interface with higher conceptual layers such as the Fifth Dimension, which itself exists as a realm of imagination. In turn, the Fifth Dimension can influence or interact with structures like Hypertime, which represents a branching network of timelines rather than a single linear temporal flow. Together, these relationships suggest a cosmology that is both hierarchical and networked, rather than purely vertical.