August 31st will be quite a day for DC. On that day they will offer only two comics for sale — Flashpoint #5 and JLA #1. And stores will be able to sell them at midnight:
DC Entertainment is kicking off the “New 52” on August 31 with the midnight release of the two red-hot comics: Justice League #1 and Flashpoint #5. To insure the event is a success for all participants, DC has established the following guidelines. This promotion is open to all US and Canadian accounts in good standing currently receiving comics on Tuesday for Wednesday on-sale. Retailers need to adhere to the on-sale date and time of Wednesday, August 31, at 12:01 am.
Only those two DC comics will be available for sale. There’s also an overship offer, detailed in the ICv2 post above.
Sounds like quite an outing.