Case maker Case-Mate is also betting on an iPhone 5C and iPhone 5S release later this month. It’s counting on September 20.
As website CultofMac says, case manufacturers don’t know any more than we do (most of the time) but they have their own overseas sources and they are putting big money down in hopes that their guess is right. We’ve seen it before. Case makers will often try to come up with these cases long ahead of an iPhone or iPad product launch. Sometimes, as was the case with the iPhone 4S, they were completely wrong.
We are willing to bet that Case-Mate is right on this one.