I don't know if overused is correct. Someone pointed out, in the new 52, he's only been used once, and that wasn't till the third story arc. In the Nolan trilogy he was written for the second movie, and rightfully so. The two ways he is mostly overused is in the Arkham games, which always grinds my gears, I wish they stayed away from him in City or Origins, but I guess it's just to tempting. And the problem with Arkham Knight is, yes he is supposed to be dead, but it's Rocksteady's last Batman game, can they resist bringing him back? Should they? The other way he is overused is by the public. We bring him up to much, the semi-fans of Batman, more fans of the movies, they bring him up all the time. I can see how we might think he is overused, and he is at times, but for the most part, I don't think that is the case, plus it's a business, you gotta go to the money maker, you gotta give the people what they want. Joker is my favourite villain, but I think the problem is, the other villains don't get enough love, they deserve their own great graphic novel story. I'm calling for great graphic novels for the Villains like the Riddler, Hugo Strange, Mr. Zsasz, Mr. Freeze, etc. The backstory is there, they just need to be reworked, and retold with the talents of Scott Snyder, Brian Azzarello or Jeph Loeb to write them.

Joker is coming back in the next arc of Batman, that's only one arc after DotF.