Cause they are fukking idiots.. Lets be real. We keep getting the same ass Batman movies over and over again. Which means they keep starting the fukk over... Which means by the time you'd get to Robin, something has already gone wrong and it's time for The Batman with Robert Pattinson.. So maybe in 2026, we'll be around to the point where we'd get a Robin. But they'll surely fukk that up by then
And Robin doesn't have to be campy or silly. You got dark, gritty batman with his upgraded tech and voice and costume. Dudes normally like 30-40 when the movie begins.. Get a 17-18-young 20s Robin.. Young fly dude that helps on the smaller side of the mission (Batman can't be everywhere). Give him a bad chick or love interest, make him always go too far and Bats gotta ease him down, make him wild and reckless to Batman's all knowing self. Make him the wildcard in the movie. Involve him in some twist or shocking action..
DO SOMETHING!!!! Shake it up. Spin it off into his own shyt. Do something new with these damn Batman movies... PLEASE