In Star Wars: The Last Jedi, we witnessed Kylo Ren smash his helmet after an encounter with Supreme Leader Snoke. In the debut trailer and accompanying collection of official images shown in April at Star Wars Celebration, we got our first look at someone repairing the helmet. The Licensing Expo, currently on in Las Vegas, has given us a clearer view of the repaired helmet.
— 寺田てら (@trcoot) June 4, 2019
We expect to get answers on how and why Kylo Ren had the helmet repaired when the film is released in December.