Okay, so, for the uninitiated, in Starfield, the New Game Plus consists of your player abandoning all of their loot, ships, and credits, and keeping their knowledge, perks, abilities, et cetera, and literally starting the game over from the beginning as the same person in another universe.
In Starfield, the many-worlds interpretation was correct, and there are multiple parallel universes/world lines that you can travel to. The way the Starborn have been doing this is by using the alien artifacts to form a device called the Armillary that permits trans-dimensional travel. Every single one of the Starborn you encounter in Starfield are humans from other universes who successfully gathered all the artifacts and used the Armillary to hop universes. Some of them have done it dozens or even hundreds of times, becoming effectively immortal and living through many lifetimes in the process. Many Starborn have experienced thousands of years of relative time, are extremely experienced, and are dangerous foes. To top it off, they have superpowers, like the ability to turn invisible, resurrect dead alien critters, force push people off cliffs, see people through walls, predict people's future movements and know what they're going to say before they say it, et cetera. As you progress through the game, finding the artifacts and traveling to their corresponding temples, you also gain these powers, which work pretty much exactly like dragon shouts in Skyrim, except with very faint and subtle prismatic visual effects that could almost be regarded as a trick of the light.
When you beat the game, you start over from the beginning, but as a freshly-minted Starborn, with all your experience, perks, levels, research knowledge, etc., but no money, no ships, no loot (except for a fancy Starborn ship and Starborn space suit), and all your outposts gone.
Here's the catch. Some of the universes you visit in NG+ are not the same exact timeline. Sometimes, you'll visit Constellation's lodge and find out that everyone died and it's just Vasco, or maybe you'll encounter half a dozen other versions of Starborn-you hanging out there. Some crazy Twilight Zone shit. From a meta-fictional perspective, the protagonist technically now occupies the same position as the audience, with knowledge of the plot, as they're now stuck in a Groundhog Day-style multiverse loop of living their life over and over again in endless different configurations and outcomes. Rather than the NG+ literally starting over from the beginning, it's part of a continuous narrative of endless dimension-hopping. For some, this might be hell. For others, it's the ultimate power trip. Point is, your character becomes a multiverse-hopper at the end of the story, and sort of a demigod.
There are a lot of things they could do with this, with DLC, to expand upon this greatly, such as having a Starborn faction plot that requires casual multiversal travel, or maybe even returning to your original universe through some as-yet unheard-of means, to find everything unexpectedly in ruins due to your actions. There are so many things they can do with this, story-wise, it's not even funny.
