Well first lets see what made OoT, WW and TP so different and be good

1.OoT
-target system
-horse back riding
-3D
-The story
-Music
-Time travel
-navi
2.WW
-The sea
-Cell shading graphics
(and probably other things I'm way to hot to remember)
3.TP
-Wolf link
-art like graphic style
-Midna
-The original story(twilight realm)
-The way dungeons have better names than wind water forest ect.
anything else tell me but maybe the new zelda will have more changes than OoT.