lmao I guess people have forgotten that the anime takes place several years PRIOR to the manga. In other words, you are far better off trying to guess what chapter the fight will happen in the manga rather than the anime as its going to be quite awhile before the anime even makes that transition to the current timeline.
If I were to take my best guess, I would assume the fight takes places somewhere in the ballpark of chapter 150-200 (manga). I would also assume that the anime will continue in it's current timeline for about 3 seasons before making the transition to the canon manga material (Naruto Gaiden / Boruto Movie recap / Boruto manga). From there it'll be several more years to animate up to the fight in the manga (assuming it is indeed around chapter 150).