Just read Black Hammer/Justice League ...
An okay first issue with pure set-up tone and form. Issue #2 will, I think, be the deciding issue on if this is going to be a good mini or a bad mini.

If you are not already lined up to get this, I say you can wait on it. Unless there is no price reduction if you wait that is. I mean, why wait if you are not getting a discount. However, yeah, if you can save some money, I say wait and at the very least get this when you get issue #2. Or heck, maybe even wait on issues 1-3 until issue #4 hits? Up to you, but this was certainly not worth the rush to read.
Not saying it is bad, no, no. It's is just a typical set-up issue. Does have some nice art, although I am now a little too used to Ormston's art style on these characters I think.
