This is how 2016 MacBook Pro 15 may look like
Apple is using the same design language for both 13-inch and 15-inch MacBook Pro for a few years, but it is a time to change the design.
They might introduce 12-inch MacBook-like 15 Pro. As you can see it looks like the bigger version of the current 12-inch MacBook. However, there are few changes. For example, there are two more USB Type-C ports on the right. On the left, it has one more Type-C port, but with Card Reader and 3.5mm headphone plugin. Even though there are total of 4 USB Type-C ports, I would like to see HDMI and at least one normal USB port, because it is the Pro model. However, it is just a concept.