I think I'm appreciating how Holy Musical Batman killed the Joker offstage in the first few minutes more now.
At this point I think the line can stand to be thinned. Tim and Jason have nothing to contribute to the batline anymore and only exist to lead their respective teams, and any team book not named Fantastic Four changes its roster and leadership as time goes on. Babs serves no purpose other than her name and even Dick seems redundant with the changes to his character and the other Robins. So I'm fine with killing any and all of them.