Grant Morrison's Batman run (their main run and the ancillary work that connects to it) is my favorite long-form Batman story, ever. I have other stories that come in just above it, but they're mostly one and done single issue stories. Morrison's run was what brought me back to comics in the late 00's, and reminded me that comics could be more than just "guy in tights knocks out the bad guy"...so that Damian Batman is a must for me. If the line had continued past this year, perhaps we would have seen the "3 Ghosts of Batman" or even some members of Batman Inc. At this point, there really isn't much from DC I don't have that I would claim as "must-haves" or that word everyone overuses - grail - and I know there are hundreds of missing characters that everyone is clamoring for but for me, personally, there's only a handful. Most would probably be from Morrison.
Otherwise, the things on my wishlist are just variations of Batman and Superman, and we have plenty of those. I feel sort of like I'm sundowning, not in the dementia sense but in the general winding down way one experiences after a long, hard day of work and you get to watch the sun go down on another productive day. I feel like my excitement level has nearly dissipated for DC Multiverse, and is slowly being replaced by other things. I know there are many here chomping at the bit for Mattel to take over, but I'm sort of sad to see it go. Much like Morrison brought me back to comics, McFarlane brought me back to action figure collecting. I saw wave 1 at a Walmart and had to have them all, called to me like a magnet and I'm very much down that rabbit hole with the rest of you. What a (mostly) fun and (often) strange trip it has been from Detective 1000 Batman to now, and while there were lots of average-to-not-great figures in the line I would say most were pretty damn great. I'm very grateful for this line, and I look forward to displaying it for years to come.