<Snipped quote by Kafka Komedy>@Avanhelsing Mentioned wanting to create that Batman. Could be that Batman helped with the creation of the JL, and is a senior member. Helped Scarecrow get in, gave him/her some tech too. Of course, it's not exactly in Bruce's character to like someone with fear toxin. Maybe this guy's a bit more lax? Or, all that stuff could have happened. (The ex-sidekick gig I mean), and still both of them are on the team, leading to tension and drama. I personally like that latter.
I might make a female so don't get too far ahead of yourself kefka.
Also I'm just making them the Justice League. Like I said in the opening post the idea is superheroes haven't really come before these heroes. Though to help with this Scarecrow idea Batman could certainly have existed as his just a dude who has tech and immense training.