Walking over the web I fond this graphic below showing the development time, including pré production, and the team size to each Zelda game up until Link Between Worlds.
Observing the tendency, sometime in the future it will take infinite years, with a infinite team, to make a Zelda game. Yes, because that is how science works. Yes.
Click to enlarge!
The same website with this graph had this photo below, it is the team that developed the Zelda game to the Super Nes, it gets my attention how Miyamoto haven't aged a single day (sort of, I know)!