For the sake of this kid not owning every point that vancouver gets...I would hold off on this trade...on the other hand when you have all your guys on one team that could put you at a huge disadvantage.
Personally, this is what i'd do. Hold on to sedin (its not as if he's hurting you at all) and in the long run you'll still get lots of points and this nucks fan won't be collecting 3 points everytime vancouver gets a goal.
If you can't live without doing this trade...ask for another player since he wants all of vancouvers starters. Maybe elias..but make sure that you're ready to drop someone.