This game will be literally so huge in content it will be crazy. The possibilities from the Botw mecanics and engine are INSANE. Now put 6 more years into a game and like adjustments from what people didn't like in the first one and you have something incredible. I hope they put more overworld boss and more secrets to discover than just shrines. That's the main takeaway from the first one that i would like to change. But like wow, i'm really not ready for the sequel. It will be literally insane.
I hope it brings back more classic Zelda monsters and bosses, because I got sick of fighting different varieties of Ganon after a while.
They def will i think, seeing how well the Lynels integration was in the 3D games i'm sure they will bring more.