One word : disappointing.
As a writer you have to lock all possibilities. We will have to wait and see if Batman is presumed dead. His friends did not search for him? Its just not a satisfying "death"
On top of that, i dont want the main character of my favorite book, gone for an extended period.
The whole arc was enjoyable until this stupid ending.
Why in the wide wide world of sports would Batmans final note be HA?