If the above image is true, Mobile fun have supposedly unearthed the plans for the iPhone 5 case, if this is real it shows the next gen iPhone having a larger display, the cast has a curved edge, similar to the iPad 2 styling, in addition to a larger, edge-to-edge display, and a larger home button.
Larger screen rumors for the iPhone have stated the screen is likely to be either a 3.7 or 4 inch screen. The larger home button is reminiscent of a report that claimed the next iPhone would feature a gesture based home button.
The case schematics, have reportedly been sent to two different Chinese case manufacturers , but it is hard to see this kind of leak being true, and very unlike apple to let something this big slip out.
Is it possible this will be the new iPhone design, yes it is possible, but until Apple release something official, its still anyone’s guess what the next iPhone will look like.