That's kind of like what I had in mind for a D4. Mine goes something like this:
The NHL is on strike but it's alright because none of the former ducks made it to the the pros. Adam Banks got the closest but he had a knee injury. Anyway the NHL is on strike and the olympic games are coming up and the US has no hockey team since none of the US players wants to leave the states anyway for safety reasons. So Gordon Bombay, who still has his job in some branch of the olympics suggest that the US team doesn't use pros. Bombay re-unties all of the Ducks from D1,D2 and D3 and Coach Orein and forms the new team USA aka the Mighty Ducks. And that'll be the last one.
But hey that's just me talking.
By the way I loved D3. That's right I said it I think that was a great movie.