Enjoyed the first half of Whatever Happened to the Caped Crusader? quite a lot. Very Gaiman-y, which as it turns out makes for an excellent chaser for Morrison. (Gaiman's working with as many layers as Morrison is, and similar themes of reexamining past continuity and the essence of the characters and questions of reality, but ultimately the story works by itself and doesn't require a trip to Wikipedia to understand.)
It feels a lot like Sandman, and particularly World's End, in how it focuses on characters as storytellers and examines the nature of life, death, the mythology of heroic figures, and the question of what is real, anyway. It's also full of sly nods to continuity, like [spoiler]Alfred telling Kirk Langstrom he can sit on either the allies' or enemies' side at the funeral[/spoiler], and [spoiler]the 1940's Catwoman wearing a cat mask[/spoiler], and cameos like crazy -- but, as the narrator notes throughout, it's NOT strict continuity; some of these events "actually happened" and others are new twists Gaiman's put out. And the last page reveal [spoiler]suggests that the person Batman is talking to is, in fact, Death -- though, on the other hand, she denies it, sort of[/spoiler].
It also evokes a bit of Ellis's Planetary/Batman: Night On Earth in how it iterates through different eras' versions of Batman (and there is a very clear [spoiler]Timm Joker[/spoiler] in one shot), and I would say the ending of the second story is very similar to Mike Allred's Batman story from Solo a little while back.
A neat read, especially for Gaiman fans and people who are interested in superheroes-as-mythological-figures deconstruction (one of my favorite subjects, as you all know by now).
Looking forward to part two -- we've heard from Selena and Alfred so far; I'd say Dick's almost certain to tell a story in the next one but I'm curious who else. Joker, a Gordon?