Since always. Look the major Bat villains are 1st string: Joker, Penguin, Catwoman, Riddler, Two-face, and maybe Bane. Second stringers include Mr. Freeze, Ivy, Killer Croc, Scarecrow, Mad Hatter, Man bat, and Ra's. The minor ones are anyone else you could think of.since when is Ra's and Ivy "not a major bat villain"?....
hell both have even been in movies....
when people think bat villains i think most would say..
joker
harley
ivy
clayface
mr. freeze
penguin
riddler
two-face
croc
bane
scarecrow
catwoman
ra's
while second stringers... and lesser known villains would be......
Zzaszz
Red Hood
Black Mask
Firefly
Man Bat
Mad Hatter
Ventriloquist
talia
this list i'd genuinely say would be thanks to the media... and there constant use in movies, cartoons, tv-shows, and video games
Oh I know.I Just think it's stupid were getting another Riddler when Ra's and Ivy remain unmade.Hell we've gotten Obscure Green Lantern villains and supporting characters why not more Bat Rouges.
True.But they've been balancing that out by releasing the heavy hitters from previous waves in the new waves.