Nintendo has worked with DeNA for a number of years on multiple projects, and Nintendo has plans to continue this collaboration down the road.
During a Nintendo investor Q&A, Nintendo president Shuntaro Furukawa discussed the working relationship with DeNA, and elaborated on the intent to continue this partnership moving forward. You can see his full statement below.
DeNA and Nintendo have built a strong relationship based on trust, and we have been working collaboratively in the development and operation of mobile applications and online services centered around Nintendo Accounts. We plan to continue making progress in our collaborations. While we are unable to make any further disclosures from our side, we would like to say that during the past seven years, both companies have learned many things through our collaborations, and we would like to continue to further strengthen our cooperative relationship in the business between the two companies