Personally, I love the Monk. He's a great early Batman foe with applications to the larger DCU beyond, and I support a return appearance anywhere... especially with the weirdness involved with the end of his 80s return, which seems worthy of exploration.
Matt Wagner did great remakes of the classic Batman comics with his two part "Dark Moon Rising" featuring Batman and the Monster Men and Batman and the Mad Monk.
I would like to see him do a sequel to "Dark Moon Rising" by tackling remakes of Batman's classic second encounters with Hugo Strange and the Mad Monk.
I would not like to see Mad Monk appear currently in any of the present main Batman comic books.