system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] How long after Batman start doing his thing, did supervillains start appearing?
gpt
About one year after. You have to remember that continuity always changes but Year One is literally his first year and he only fights the mob. The Man Who Laughs is supposed to happen almost immediately after that. So by year two of Batman's appearance is when the Joker arrived.