The latest iPhone 7 leak comes from China (as do most of them really). A picture showing what is going to be the handset's rear casing has been leaked, and you can see it to the left. This is the shell for the rose gold color version of the upcoming iPhone.
You can see the revised antenna lines on the leaked case. The position of these lines up with what basically every single leak and rumor about the iPhone 7's design has said so far, so at this point it's hard not to believe that this is what Apple is going for with its next smartphone.
As usual, Apple should unveil the new iPhones at an event in September. They might come with 32GB base storage, as revealed.