New DC Downgrade:
Regular Universes — Low 4-C: Canonically, each individual universe (Earth-0, Earth-2, etc.) is a single 4-D space-time continuum with physical limits (Source Wall boundary).
Orrery of Worlds —4-C: The Orrery is the multiversal structure containing many universes in an 11-D brane setup (per Morrison).
Sphere of the Gods — Low 4-B: This magical realm hosts divine beings (New Gods, Endless Angels, Demons ), existing “above” physical universes and being "realer than real", but still tied to them.
New Gods & Olympians (True Form) — Low 4-A: Exists on a higher level of existence than the Orrery of Worlds, residing in the platonic and archetypal worlds of the Sphere of the Gods. The true forms of the New Gods, such as Darkseid, embody cosmic principles that govern the fabric of existence itself. They emanate lesser aspects of themselves into the physical universes of the Orrery of Worlds, as their true forms are too vast and metaphysical to directly exist within lower-dimensional reality.
Comic Book Limbo — Low 4-A: The last outpost of existence before reaching Monitor Space and the container of the Orrery's forgotten ideas, with no time to waste or stories.
Monitor Sphere — Low 4-A: The fundamental, archetypal world of the Monitors. Exists at the edges of things from the Multiverse's current structure, concepts like space, time and scale being more profound and meaningful there.
Dark Multiverse — Low 4-A: A vast subconscious realm of dark matter upon which the Multiverse float. It contains an infinity of failed universes and a dark mirror to the Sphere of the Gods known as the Other Place or Darkworld.
Divine Continuum (Omniverse + Hypertime) — 4-A: The totality of all space and time, including the Omniverse (all multiverses), and Hypertime (all timelines and temporal flows), containing all possible dimensional spaces. It is defined as all space and time, even if conceptual/emotional rather than physical.
Endless (True Form) — Low 3-C: Are the primordial truths that make up every aspect of The Presence's creation and are believed to oversee every aspect of reality as the functionary of wave patterns, ideas, and motifs. Their influence spans the entire Divine Continuum. However, each of the Infinites that we see and perceive is only an aspect of their truest being, in the sense that what we see is only one viewpoint of the total and pure conception of the Endless.
Although the Endless reside in the Sphere of the Gods, they are not confined to it. Born from the Big Bang as cosmic archetypes, they govern every aspect of the Presence’s creation, with their influence extending across the Totality of Existence, that is, the Divine Continuum in modern representations.
Fifth Dimension — 3-C: This imaginary realm hosts the Imps like Mister Mxyzptlk and Bat-Mite, existing beyond time and described as being everywhere at once.
Sixth Dimension — 3-C: The Multiverse’s penthouse and highest plane of existence, existing beyond time, space, understanding, and imagination. Accessible only to the few most powerful cosmic beings.
Source Wall and Promethean Galaxy — 3-B: The seemingly infinite barrier that separates the Multiverse from the Greater Omniverse. It exists in every universe and realms of the Multiverse and constitutes its boundaries.
Greater Omniverse/Infinity/Eternity — 3-B: A boundless expanse beyond space and time, where infinite Multiverses rise and fall. It contains the Hands, the cosmic agents of the Source who shape realities with its raw energies, and the Deep Change, from which the Speed Force and Still Force emanate. Time is a dream of the Deep Change. The Source resides at the center of the Greater Omniverse, which itself exists within an insignificant section of the Overvoid/Void.
Source/Presence — 3-A The infinite, untainted wellspring of creation, light, and life that encompasses and transcends all. All of existence is but a dream from its perspective. One of its manifestations, such as the Presence, recreated the Multiverse after the fall of Perpetua and commands the Archangels, while other aspects of the Source, such as the Deep Change, emanated Time from itself and perceive it as a dream.
Great Darkness — Low 2-C: The antithesis of the Source and Creation, representing the absence of light and is the shadow partner of the Source. It predates the Source and the Greater Omniverse.
God/Unknowable/Overvoid — Low 2-C, possibly Higher