system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/MCU] How strong are Earth's own heroes and villains compared to the vastness of outer space's collective of heroes and villains?
gpt
On Earth-616? The Avengers are strong enough to the point that the Kree, Skrull, Spartoi, & Shi'ar Empires declared Earth a quarantine zone to prevent the Humans, Mutants, and Inhumans from leaving the Sector.