Dark Nights: Death Metal - List

“Dark Knights: Death Metal” has been announced! Now, I need a list of reading material. I have read Metal, the No Justice mini series, but I need to read everything that could be relevant to this upcoming sequel.

Here is what I currently have:

-The Batman Who Laughs mini series (and associated one shots)
-Batman/Superman series (and associated one shots)
-Hell Arisen mini series (I know this comes at the end of Year of the Villain, but do I really need to read it to understand Hell Arisen?)

I need any other reccomendations! I usually wait until I can get a collection, but I need to be up to date on this