Looking at the solicitations for July, it looks like it's definite that the origin of the H-Dial is going to be revealed in Dial H. With that, I dropped it from my pull list at my LCS this week. I've been considering doing this for awhile because I haven't been enjoying it the way I did for its first storyarc. This information was the final straw.
The H-Dial is something that works best as a mysterious object with not enough known about it. There's just no way that its origin can be revealed without that origin sucking. DC doing this is just stupid, they're going to destroy a lot of what makes the H-Dial a cool an interesting thing in the DCU.