Here's what I see happening:
June WWDC: iOS 7 Previewed; iPad 5 Introduced; iPhone 5S Introduced
June: iPad 5 Ships/Launches
July: iPhone 5S Launches with iOS 7
September Keynote: iPad Mini 2 Introduced; "Cheap" iPhone Introduced; iOS 7.1 Previewed
September: iPad Mini 2 and Cheap iPhone Launch with iOS 7.1
November Keynote: iWatch Introduced
November: iWatch Ships
They won't launch the new OS after only a month in beta.
Here's what I see happening:
June WWDC: iOS 7 Previewed
September: iPhone 5S Launches with iOS 7
October: iPad Mini 2 Introduced; iPad 5 introduced