Christian Bale is making the switch from the land of DC to Marvel with the new 'Thor' movie, but the Oscar winner hasn't forgotten his roots.

Bale and Christopher Nolan helped define superhero cinema with their 'Batman' films between 2005 and 2012, and Bale is open to the idea of suiting up as the Caped Crusader on the condition that Nolan directs.

“I have a pact with Chris Nolan,” Bale said.

"We said, ‘Hey, look. Let’s make three films, if we’re lucky enough to get to do that. And then let’s walk away. Let’s not linger too long.’ In my mind, it would be something if Chris Nolan ever said to himself, ‘You know what, I’ve got another story to tell.’ And if he wished to tell that story with me, I’d be in.”

Bale indicates the conversation for him to reprise the role hasn't happened, and shot down rumours that he has been asked to make a comeback.

"Occasionally people say to me, ‘Oh, I hear you were approached and offered all this.” And I’m like, ‘That’s news to me. No one’s ever said that," the Welshman said.

Bale still hasn't seen the most recent Batman outing, and said he doesn't have the chance to watch too many films.

"Listen mate, it’s amazing how few films I see. Every director I work with, I’ve seen a couple of their films and they’re always looking at me going, ‘Are you kidding?’ I like to really savor films and I don’t watch too many. But I will, I certainly will watch 'The Batman'.

Bale was full of praise for Robert Pattinson, saying "Robert is an absolutely wonderful actor. We bumped into each other, talked a little bit about it ahead of time, and I heard wonderful things.”

Nolan is currently hard at work on his next epic, 'Oppenheimer', which has cast pretty much every working male actor in Hollywood except for Paul Giamatti.

Cillian Murphy heads up the all-star cast as J. Robert Oppenheimer, the father of the nuclear bomb.

The film is on track for a July 2023 release date, with Murphy starring alongside (deep breath) Robert Downey Junior, Matt Damon, Gary Oldman, Florence Pugh, Emily Blunt, Rami Malek, Kenneth Branagh, Jason Clarke, Jack Quaid, Josh Peck, Matthew Modine and Benny Safdie.

As for Bale, former Batman will next be seen on our screens as Gorr the God Butcher in the upcoming 'Thor: Love and Thunder', which hits Irish screens on July 8th.