Mackenzie at 16 got proposed to by harry before leaving the isle and said yes a thousand times yes. 

Mackenzie asked Ben if Harry could come to Auradon as a new vk student from the isle and Ben said yes he can let's go get him and Uma and Gil also Kenzi.

Kenzi says to Ben Thx so much this is a dream come true. 

Ben tells Kenzi No problem just doing my duty as King of Auradon.

- on the isle -

Harry hook looks at Auradon missing his fiance Mackenzie when he gets a letter from King Ben Saying be ready in a few hours me and Mackenzie are coming for u and Uma and Gil.
~ King Ben and Mal's advisor Mackenzie of the Isle ~

Uma gets one as well and so does Gil.

- in the limo-

Ben asks Kenzi Are you excited?
Mackenzie tells Ben Yes I am.
Ben *smiles*
~ the limo arrives on the isle ~

- on the isle -

Harry sees kenzi and runs to her*
Kenzi runs to harry*
Ben laughs* guys be careful.
Kenzi and harry roll their eyes at ben*
Whatever Ben.