NetherRealm Studios have announced that series mainstay Raiden will indeed feature in Mortal Kombat X, with a new trailer showing two minutes of gameplay footage.
The video shows Raiden fighting newcomer Kotal Khan, using his trademark lightning-based attacks. Of course, his X-Ray Moves and Fatality are also on display.
Mortal Kombat X was announced shortly before E3 2014, and is in development for Xbox One, Xbox 360, PlayStation 3, PlayStation 4, and PC. It's planned for a 2015 release.
Source: IGN (YouTube)