How this ties into the film itself remains to be seen, but the wings ... stored in Prime’s trailer. The official description includes the following: “The Mechtech Ultimate Optimus Prime ...

When you transform Optimus into Jumbo Jet Wing Racer mode, Prime’s jet wings allow you to launch figures forward at blazing speed. If Prime is in Jet mode, you can use the wings and the main ...

You might have noticed that Optimus Prime had a set of what looked to be like wings. How it ties into the film remains to be seen, but these wings appear to be the result of something "Mechtech." ...