I don't know a ton about Deadman, he rarely showed up in the DC books I read. But he was in Batman: the Brave and the Bold a few times. Yes, it's not the same, but you do get a bit of a feel for the character. But to say, a diehard Marvel Zombie?
Well, Diversity and Comics couldn't follow it:
Now, if you didn't watch, let's talk about some plotholes. They're everywhere. Jim Gordon, commissioner of Gotham PD, is a temporary ambassador for a NUCLEAR FACILITY inspection. What about all the scientists in the DCU? Where's the Atom? Where's Professor Martin Stein? Good grief, there's bad guys with better qualifications than Gordon.
Now, Neal Adams managed to do things that can only happen when the same guy does writing and art: plotholes in art and layout. It's honestly impressive when something that happened in art apparently just unhappens in the art. There's also travel bits that make no sense, when he's supposed to be able to just appear where he needs to be.
DC should just shut this down now. Get a writer to work with Adams, his art is still good, but don't give him the writer/artist control. His Batman mini was largely deem incomprehensible, and why encourage him by giving him another one? Not everything has to make sense right away, but enough does that the questions get asked initially and answered later.
When you play Social Justice, the world loses.