The Brain

Debuting in the pages of Justice League America #98 in 1995, The Brain is a DC character who arrived at the cusp of the Modern Age surrounded by some of the most iconic figures in comics — sharing those early pages with the likes of Superman, Wonder Woman, and Bruce Wayne. Though their catalog footprint is compact, spanning appearances across Justice League America, Supergirl Annual, and Multiversus: Collision Detected, one of those issues carries genuine key-issue significance, making The Brain a quietly collectible presence. For fans who love uncovering the lesser-charted corners of the DC universe, this is exactly the kind of character worth tracking down.