User blog comment:BackToTheFuturama86/HAL 9000 vs GLaDOS. Epic Rap Battles of Villainy Season 1/@comment-25519319-20151021065507/@comment-25519319-20151021065815

Also suggestion time:

Team Rocket vs Harry and Marv (I know the connection is just silly criminal duos, but it sounds hilarious inside my head)

Springtrap vs Indominus Rex

Godzilla vs Gamera