I've often wanted to see an event similar to the events of No Man's Land but more in line with the Arkham games. I think it'd be fun for Arkham to be rebuilt and for it to have massive implications for Gotham. What I'm thinking is that the Batman could lose his allies in the Police department and for the Bat Family to be labeled as public enemies. I'd also like the idea of Arkham Knight to be expanded on like for it to more than one person wearing the mantle. What I'm thinking is for the Arkham Army to be introduced as reinforcements for the police and made up of highly trained soldiers tied to the colony featured in Batwoman that can actually handle the villains in Gotham but for their methods to be very extreme and controversial with a mysterious head knight leading them.
I figure it could be set up like the fall of the jedi and rise of the galactic empire with the Bat Family having their identities all outed attacked and pursued on all fronts with no safe haven having it be revealed there's a traitor. Now this next part of my idea is a bit of a jumping the shark but I like it. My idea is to the same thing done with Speedy and Arsenal in Young Justice where one was a clone spying on the heroes and the real one was a prisoner. I was thinking it'd be cool to see this done with Tim but instead of him being frozen or whatever he'd be held prisoner for years and tortured to the point of insanity and suffering trauma after trauma and after escaping he sees the clone as Robin and feels replaced and betrayed so he just tries living his life and doesn't go back and ends up corrupted by the mastermind who did this to him ultimately being tricked into crime and ends up like Anakin even losing a lover and ending up burned and being reborn taking how Bruce trains robins and applying that to other knights even recruiting orphans Bruce had selected as candidates and training them more brutally.
I like this idea because I think it'd be interesting as I'd like to see Bruce react to seeing how he selects and trains orphans perverted especially if Tim had grown unstable and abusive not tolerating failure. I also like the idea of Tim becoming like Darth Vader and a dark reflection of Batman and saying "Tim Drake was weak I destroyed him." Especially since there are versions where as Batman, Bruce will act as he's a different person in both parts of his life like in The Batman series. I think seeing a darker take on that would be interesting to see and for Bruce to face.