What happens if you trade Fabbro for Nyquist and Fabbro decides to sign with someone else? He's in college, you only get an exclusive right to negotiate for a period of time, then he comes a UFA basically (with restrictions on contract size and length).

Dante Fabbro wont sign with Nashville, Zero chance he signs with Detroit. He'll play out his last two years of college. And become a UFA and sign with a team of his choice. And that wont be Detroit.

NSH can sign Fabbro to an ELC before the TD and trade him to DET. We would then own his rights until he becomes a UFA. Why wouldn't he sign in DET? We will be an up and coming team with plenty of opportunity on the blue line.

No they can't if he remains in College, By all accounts Fabbro is staying in college. And will be a UFA in 2020. Free to sign with any team. Maybe in two years if Detroit can convince Fabbro that they're the right team for him. Even most insiders in Nashville say Fabbro is as good as gone.