We fought the good fight, now it's time to drop it, ASAP. I really can't see us adopting some new age stupid-ass nickname like Firehawks or Storm. Here come your University of North Dakota Fighting Green. Whatever we do, Green, White, and Black must stay.
No nickname at all would be ideal, but as others have pointed out, it looks like we must adopt something new per the settlement. Let's make it as generic as possible until such time comes that something else emerges, if ever.