These mock ups are fine, but I don’t think the logo needs a makeover, just offer a different helmet color.
Albeit, if the athletic department and football program actually were willing to entertain a different logo on the alternate helmet, I’d say go ahead and try it. But I think UND has put enough effort into nicknames and logos over the past 20 years for the next 100 years. Stay as far away from nicknames and logos as possible for the near future. It’s been a waste of time and resources to say the least.
Just stick with the current logo and slap it on a nice white or all matte black helmet for an alternate