Yesterday during a live stream Sony's Shuhei Yoshida stated the following:
"I just played Zelda! The new Zelda game. You know, open world, and hunting. And I had a bizarre feel, this feels like Horizon. This is a epic, huge game. I can not wait to play Zelda again when it comes out."
Personal thought: I stated previously here on VGChartz that the latest gameplay shown at E3 of Horizon resembled the E3 2014 trailer for Zelda and it looks like I'm not the only one to think so...