This could be fascinating. Or ridiculous. Offhand, the only major attorney characters I can think of in superhero comics are Marvel's Matt Murdoch (aka Daredevil) and DC's Harvey Dent (aka TwoFace). But I'm sure I'm forgetting some, and I've been pretty much out of comics for a while. Back in the day, I always wondered what happened when supervillains went to court and the main witness to their crimes were the heroes that caught them. I'm sure somebody's found a way to address that creatively in recent years, and whether a superhero can testify in court without revealing their secret identity.