Dreamtime

Part 1: The Dossier: An At-a-Glance Summary

1)
First appearance of the Dreamtime and Gateway: Uncanny X-Men #229 (May 1988).
2)
The in-universe term Alcheringa is a real term from the Arrernte language of Central Australia, referring to the Dreamtime. Marvel's use of the term is a direct nod to the concept's real-world cultural origins.
3)
Chris Claremont's introduction of Gateway was part of a wider trend in his work that brought international characters like Colossus (Russian), Nightcrawler (German), Storm (Kenyan-American), Sunfire (Japanese), and Banshee (Irish) to the forefront of the X-Men.
4)
Visually, portals through the Dreamtime are often depicted with a unique artistic flair, incorporating patterns reminiscent of Aboriginal dot art, setting them apart from the technological shimmer of Shi'ar portals or the fiery circles of magical gateways.
5)
While Manifold is considered a mutant, the source of his power—the Dreamtime itself—is a fundamental force of nature, not a result of his X-gene. The X-gene is merely the “key” that allows him to access it.
6)
The concept of a “songline” or “dreaming track,” a path across the land or through the sky used by creator-beings in the Dreaming, is a core element of several real-world Aboriginal belief systems. This is conceptually similar to how Dreamtime portals connect two distinct points in space.
7)
The extreme sensitivity and cultural significance of the real-world Dreamtime to Australia's First Peoples is likely a major reason for its careful and relatively infrequent use in the comics, as well as its complete absence from the more mainstream MCU.