Board Thread:Questions and Answers/@comment-24520051-20161120235846/@comment-1257201-20161130034421

Difficulty is hard to gauge. If the answer can be looked up on this site, the question might be too easy, but if it can't, the question might be too hard.

Name a Batman-related character (hero, villain, or supporting character) who was erased from existence after Crisis on Infinite Earths and the Year One reboot.

[If this character was reintroduced decades later, it still counts.]