Fan Casting Loki in Thor: The God Of Thunder

Thor's mischievous and untrustworthy half-brother. He becomes regent of Asgard after Thor is banished to earth. He had a short reign where he still managed to cause a ton of chaos and destruction. He is eventually defeated by Thor when he comes back to Asgard and demands the throne, as Loki was clearly too insane and powerhungry to be a regent.