I hope reviewers have Horizon fresh in their minds when looking at Zelda.
Horizon is a new IP with no preconceived notions or reputation around its quality and was reviewed as such.
I hope Zelda gets the same treatment and reviewers leave their rose-tinted glasses off and judge the game on its own merits and not just give it high scores because it has Zelda in the title.
Would it even be the same reviewers? They are big games released so close together, I'm not sure you can review both properly at the same time.