Just to clear this up for people, Friedman never linked Dvorak and Detroit. I listened to the Arizona section about Dvorak and then the Detroit section. Nothing there.
Furthermore, even the teams he did mention were in the context of "these teams make sense." Nothing along the lines that a trade was in the works, but more speculation that it makes sense given where Arizona is at and what those teams need.
It appears the part linking Detroit came from Jim Parsons at the Hockey Writers who cited Friedman saying Detroit had interest on his 31 Thoughts podcast, but again, Friedman never actually did that.
Conclusion: Rumor based on assumptions that makes sense but literally nothing else.