Flash #22 hits stores this Wednesday based on a plot outlined by Geoff Johns and leads directly into the recently announced Doomsday Clock, also written by Johns, that will be released this fall. This is the final issue of The Button cross over between Batman and Flash.
This scene from Watchmen is not going to spoil anything in Flash #22 but it will give it better context.
Here is the page in question:
[Source: Bleeding Cool News]