Yeah, I would love that if they did some more serious, prestigious 10-12 episode series like you said, maybe either connected to the DCEU with something like Nightwing or Gotham Central, or it's own thing separate from DCTV. Like, I just can't watch Gotham and really feel like it's part of the Batman mythology, it just feels so off brand because they can't have Batman involved. Since they have separate film universes for TV and film, with two versions of Flash, why not add another, focused on Batman that's it's own thing. Either a serious, gritty, dark actual Batman series or Gotham Central, like True Detective or The Wire meets the insanity that is Gotham City.
I'd love to see a serious, mature, dark live action Batman that is modeled on The Animated Series. Like, not set in the 1930's, more like an ambiguous time period where Batman can have all sorts of technology, but visually based on those old 1930's gangster movies. Something that looks similar to Affleck's new Live By Night film. And it's kinda like in The Wire the Baltimore inner city is the main character, except it's Gotham City, focusing on Bruce/Batman and other characters, the police (Gordon, Bullock, Renee Montoya, Crispus Allen), the media (Vicki Vale), politicians (Harvey Dent), the villains, street criminals, junkies, etc. Superman can have cameos, with his look based on the Fleischer cartoons. They'd have a lot more time and freedom to explore the themes of Batman, the detective and crime drama aspect, without having pressure to be the big blockbuster action film.