@JeremyECrawford @mikemearls can dispel magic undo a druids wild shape (
— James RePass (@jprepo1) January 25, 2016
Dispel magic ends spells. Wild Shape isn't a spell. #DnD https://t.co/aWMRux4zQD
— Jeremy Crawford (@JeremyECrawford) January 27, 2016
Then someone should reword the description of Dispell Magic. It clearly states “magical effects”. And as a druid gains level he can increase the HD of the creature of its transformation just as a higher level dispell magic is required for higher level magical effects. A magical item is not a spell either and dispell magic at least has an effect on a magical item if successful.