The conversation between human and AI assistant.
[|Human|] Name some of the well-known supervillains of Marvel Comics as per the passage.
[|AI|] Doctor Doom, Magneto, Ultron, Thanos, Kang the Conqueror, Green Goblin, Galactus, Loki, and Kingpin.
[|Human|] 
Name some of the well-known supervillains of Marvel Comics as per the passage.