Speaking to Newsarama, the writer described the plotline as a "Flash-Batman story" and called it "the most accessible" series he has ever worked on.
"There are a lot of new characters in here. This isn't just one of those stories were you take the DC Universe, shake it up, and say, 'This is what happened to so-and-so'. There are a lot of new characters in here as well," he explained.
"You, as the reader, are in this universe with Flash, meeting all these characters for the very first time. Some of them are brand new. Some of them are characters that you maybe aren't familiar with, who are in a different place. But it's very much a journey where Barry's in the dark as much as the reader."
Flashpoint begins as a five-issue miniseries based in a world where history appears to have been altered, but only the Flash and Booster Gold realise something is amiss. A total of 16 three-issue miniseries and several one-shots will tie in with the title.
Flashpoint #1 arrives in stores in May.
> DC reveals Flashpoint tie-in titles