Apple had made it clear way before WWDC that this event would be only for softwares and operating system which include iOS 5 and Max OS X Lion.Apple mentioned this way before event because people expect new iPhone to be revealed in WWDC.But the rumors suggest that next iPhone would be launched in the month of September.
And today again 9tor5Mac has reported that iPhone 5 or whatever Apple would name it is in the final testing that and then in July the mass production of the device would start and in September Apple may launch it.
Even in April Reuters had claimed something like that.
Apple Inc suppliers will begin production of its next-generation iPhone in July this year, with the finished product likely to begin shipping in September, three people familiar with the matter said on Wednesday.
Also apart from this claim 9to5mac has also find the codename for iPhone 5 in the iOS 5.0 sdk.