Additional Details:
We have seen wide range of trade scenarios for Subban from Habs fans on here recently.
1. KK/Lehk/Mysak/3rd (2719864)
2. Kulak/2nd (2718198)
3. Poehling/Lehk/3rd (2717145)
4. Lehkonen/Kulak/2nd (2716788)
5. Lehkonen/Harris/3rd (2716610)
6. Drouin/3rd (2716654)
7. Lehk/Kulak/5th (2716514)
8. Vejdemo/3rd (2716402)
9. Byron/2nd/2nd (2715986)
10. Future Considerations (2710744)
Kotkaniemi would be an optimistic return in any scenario. But maybe if we retained fully and added a pick (or maybe took cap back). I don't think NJD would look to Drouin, Byron or Kulak. But could certainly use a guy like Lehkonen for penalty kill.
So my guess, a even deal would be something like #3 or #5 above.