UPDATE: Northwestern officially released its full uniforms Friday for Saturday's game against Duke, and the Wildcats will be in all white:
Northwestern will debuting new helmets this Saturday when the Wildcats take on Duke. A photo was leaked on Twitter Thursday night:
This picture comes after Northwestern assistant athletic director for communications Paul Kennedy hinted at new helmets for Saturday on Twitter Thursday:
Sources on the practice field indicate the @NUFBFamily may be discussing thinking about considering the debut of a new helmet on Saturday.— Paul Kennedy (@PK9) September 17, 2015
The Northwestern football Twitter account also tweeted about the new helmets:
Here's another leaked picture of the helmets, which will presumably be officially unveiled Friday:
The helmet features a big wildcat logo similar to the one featured on the black helmets worn by Northwestern against Ohio State in 2013.