Batman, along with many of his fellow DC heroes, has experienced his share of multiversal adventures and team-ups. From crossovers with Spawn to meet-and-greets with other versions of himself, the hero is one of the multiverse's most prolific explorers. In fact, Batman's attempt to understand the concept of alternate realities has even landed the hero face-to-face with dark counterparts like Owlman and The Batman Who Laughs.
Source：https://www.cbr.com/best-batman-multiverse-adventures-dc-comics/
