system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Does the "Earth" system work differently in the MCU? Wasn't it said the MCU Earth was Earth-199999?

Minor Far From Home spoilers, from an Ellen clip.

Mysterio says that the MCU Earth/Dimension was Earth-616, which is most commonly known as the Main Comic Universe. It's been in my head for years that the MCU was confirmed as Earth-199999.

Is this actually true? Is the MCU Earth-616 completely disconnected from all other Marvel media (as we've seen cross-Earth leaps many times before, so all the others are connected), or is Mysterio bullshitting us?
gpt
We're not gonna know the answer until the movie comes out.

Two possible theories:

* Someone goofed when it came to the continuity. Or "616" is just being used as a placeholder term for the most familiar Earth by Marvel now, in the same way that Peter B. Parker comes from E-616 in *Into The Spider-Verse.*
* The Multiverse stuff is bullshit and Mysterio's running a con, but he slipped up here.