I loved Carrie and wish she somehow snuck into mainline canon. Would be great if Damian had a "sister" to play off of. Then again the bat-family is already a bit too big.
What would be the best way to get rid of Duke? He's the least interesting character in Bat-Man's lineup right now imo.
This is essentially what Tomasi and Gleason were doing in their Batman and Robin run.
This still hurts
The thought of Bruce having to do that