According to Imran Khan who is the editor of Game Informer, has revealed in their recent Game Informer podcast, which you can watch for yourself below, Khan said:
“I was just thinking what I should say about that. The next Zelda will probably be sooner than we think…I will talk to you guys off camera about stuff.”
And when asked if it's a game built by the Triforce Heroes team and include co-op, he stated, “Um, not exactly.”