Hiddleston explained, “There is a personal engine but it's behind a degree of megalomania. When you see Loki let go of that spear at the end of Thor, he lets go of Asgard, he lets go of Asgard and his need for that place and his attachment and need for the affection and respect of Odin and his brother. As he disappears in that wormhole, that's a literal way of saying, ‘I'm done. Asgard is gone and I have other things to do.’”
He added, “At the beginning of The Avengers, you see the beginnings of what Loki is planning and if he doesn't belong in Asgard, where might he belong? In that tragic place of confusion of ‘Where do I belong in this universe?’ Loki's answer is ‘I will make myself belong’, which dark and menacing and dangerous.
Tom continued, "I think Loki is very flexible and adaptable to the present context. With each Avenger, he faces a different threat, a different strategy and methodology. Some pose more of a threat than others in his mind, but they all have their own unique superpowers. I say it's like tennis. You'll never play the same game of tennis with a new and different opponent. The magic happens in the space between you, not just with the characters but the actors too.”
The Avengers is set to be released in the UK on April 27 and in the US on May 4.