Pat Fitzgerald's Wildcats have been an Under Armour school since 2011. For the past two seasons, the 'Cats have presented a fairly consistent look and feel, but they've introduced additional helmet/jersey/pants combinations along the way.
Earlier today, the Northwestern athletic department released a new video in which senior linebacker Collin Ellis shows off a variety of those different Wildcats uniform combos. From the traditional purple and black, to black on black, all the way to an all white combination, a spectrum of NU's various looks are showcased with cool editing to show the jerseys switching almost seamlessly.
Last season Northwestern introduced Wounded Warrior uniforms, which drew controversy for a visual style resembling a blood splattered flag. It remains to be seen what tweaks (if any) the program will introduce to their look this year -- though an alternate uniform or two is probably a safe bet, particularly after the offseason they've had.