No one wants make new characters for any other DC franchise because they know once their run is done, the new character is going to get wiped and never heard from again. Batman characters( even unpopular ones) tend to stick around. So we get treated to an ever growing number of Batman sidekicks. Do we really need four plus robins? Damian Wayne essentially killed Tim Drake’s reason for existing and now they are scrambling to find a reason for Tim to exist. When you have so many characters that they start to cannibalize each other’s roles, I thing you need to stop.
Some of this creative energy could have been used in other books. Then their are the newer villains. Half of them are either completely generic( they could have just as easily been in Green Arrow’s or some other hero’s rogue’s gallery) or redundant. What makes Batman’s rogues so good is the fact that they are twisted versions of him. I think DC really needs to spread their new character creation out. Their are many heroes that need some new villains and supporting characters, or at least some further development of the ones they have.