If you are the owner of your island then your island size will be updated to 200 x 200.
Any future island resets will also have an updated island size. 

If you are the owner of your island then your island member slots will be updated to 15 member slots.
Any future island resets will also have an updated island members. 

If you are the owner of your island then your island hoppers will be updated to 400 hoppers.
Any future island resets will also have an updated island hoppers. 

You will receive access to the Legendary Generator.

You will receive access to the Premium Generator