During the investors briefing in Tokyo, Nintendo talked a little on the service DENA is working on. Today, Tatsumi Kimishima called this service “My Nintendo”.
Information comes from The Wall Street Journal
"Nintendo’s new membership service will be called “Nintendo Account” — it will connect hardware users, as well as PC and smart device users, Mr. Kimishima says."
Nintendo also shared plans on using a cloud-based data service to transfer game data between mobile games and console titles.