The Wild view Eriksson Ek as their #1 C and he's continually establishing career highs (61 points in 67 games) on a value contract, so I'm not sure why they would give him and a 13th overall to move up in the draft when it may be in their best interests to keep their win-now players while integrating their prospects (Wallstedt, Khusnutdinov, Faber, Rossi, Boldy, Kap are all in their 20s or younger) and it may be a big loss to lose the stud C who can keep things stabilized against the opponent's best players.
Couple that with Zegras' duplicated skillset on the Wild (who have many skilled forwards) and the fact that he just had an off year and I'm not sure why Minnesota would sell.
It makes sense for the Ducks who would be stacked with Joel - Carlsson - McTavish up the middle after this trade at the cost of just moving back a couple of spots (and it could speed up Anaheim's rebuild to have this key C cog in place), but I'm not sure why the Wild would do it.