Former Batman actor Christian Bale may be joining the Marvel Cinematic Universe as part of Taika Waititi’s Thor: Love and Thunder. According to Collider, Bale is in talks to join Thor 4 in an undisclosed role.
This is purely speculation, but given that Waititi has cited the comic The Mighty Thor as inspiration for his next Thor movie, it could be that Bale will be playing a villain from that series like the evil businessman Dario Agger who transforms into a powerful Minotaur. The Mighty Thor is part of a larger Thor saga where Gorr the God Butcher is the overarching villain, so that character may be a possibility.
Source: IGN.com Christian Bale Reportedly In Talks to Join Thor: Love and Thunder