Leaked renders of what is believed to be this year's upcoming iPhones have appeared on Weibo. These sources have yet to be confirmed, but what they do suggest is that the new iPhone 8's upgrades have made it into a beefier device.
http://www.notebookcheck.net/iPhone-8-may-be-the-thickest-Apple-smartphone-since-the-iPhone-4.213122.0.html