It's kind of a cool idea, but I could see it getting old really fast.
To me, the real issue is that DC tends to overuse the Joker these days (or at least it seems that way). They trot him out for every crossover and usually one or two additional stories. That creates the "revolving door" feeling.
I would think a better way to do it would be sort of to "rotate" things: sometimes he escapes, sometimes he gets captured, sometimes you think he may or may not be dead.
Make his MO a little more like a "real" serial killer. Have him lay low for months, or years at a time, plotting something "big."
As opposed to now, where he's often (mis)portrayed as a crime boss.
