Okay so I have only come across one or two reverse!robin posts and donāt know how original these takes are. But whilst weeding i couldnāt help but think about the Batfamās dynamics and how that would be altered, so I decided to dump a few hcs below (in order of appearance):
1. Duke Thomas: On paper, not much of his origin story really changes. Still has powers, is still Signal, still led something akin to the We Are Robin movement (except it wouldnāt be called that, because āRobinā doesnāt exist yet), and still is part of The Outsiders. He is the first superhero/vigilante to really work with Batman on a regular basis, which of course is a struggle in of itself. Heās no sidekick by any means, but his help when needed becomes vital to Batman and helps the bat become more lenient to working with people.
2. Damian Al-Ghul Wayne: while Damian would have no older siblings constantly at the manor to be jealous of, I think his snobby attitude of instantaneously deserving the Batman mantle is something he still struggles with. He doesnāt really come up with a hero code-name for himself early on in his career (he thinks itās beneath him); but goons and innocent civilians alike make comments about how heās always lurking in the shadows and nickname him The Shadow. The nickname sticks, and many a joke can be made about Batman and his Shadow. (if anyone has a better hero name for Damian pls let me know)
3. Cassandra Cain (Wayne): her backstory and such remains the same, except sheās the one who created the mantle of Batgirl (which, of course, looks different from Barabra Gordonās original batgirl). Sheās the first of Bruce Wayneās adopted children, and I personally donāt think their bond would differ any more than it would from canon. Because sheās introduced earlier in Bās life and can bring out a softer side of the dark knight, Batmanās relationship with the kids that follow are slightly shifted.
4. Timothy Drake: meets Batman because he kept trespassing on Wayne Manor property. Tim has been stalking Batman, figured out his identity, and wants to fill in the vacant spot left by a recently departed Damian [who either A) went rogue B) went off to partner with Jon or C) formed his version of the teen titans, dealerās choice]. Batman, while comfortable enough with having Batgirl and Signal as assistance covering patrols or messy cases, is at first hesitant to have another constant āsidekickā, but eventually comes around to the idea. Tim would have his own cool name but Iām not that creative.
I didnāt want to dump Jasonās trauma on Tim now that he becomes the second son, but narratively I do think he wouldāve ended up dying as well (if so, itās because Joker Junior was fatal). Yes he ofc comes back, probably angry, but Tim is NOT Jason and will have different reactions/ ways to cope with that.
5. Stephanie Brown : Steph gets introduced mid-Timās sidekick run. I donāt think her lore would change much really, youāre doing great sweetie.
6. Jason Todd: Jason meets Batman the same way he meets him in canon, except this time Batmanās trying to cope with loosing Tim and his failed partnership with Stephanie (sheās killing it as Cassā partner though), but decides to recruit and later adopt Jason anyways. Jason would take on Timās old mantle, but I think he would eventually carve out his own vigilante identity when he got older. He still becomes Red Hood after a very rough falling out with Bruce, but like in canon theyāre slowly able to rebuild their relationship.
7. Dick Grayson: our boy wonder gets introduced in the same manor as in canon, he just does it later when Bruce has already gotten a bunch of kids. He still creates the outfit and mantle of Robin, and becomes Batmanās new main partner-in-crime fighting.
8. Barbara Gordon: Her overall dynamic with the other bats would change from canon (it would be her looking up to Cass and Steph rather than the other way around). I think she and Dick would have the same dynamic as in The Batman (2004).
I havenāt read every bat-related comic ever and would love to hear any thoughts/suggested changes you all have! Thanks for reading this monstrosity of a post!