Bleach TYBW: Why Yhwach cannot surpass Aizen as the best villain in the series
Yhwach will certainly leave a mark in the Bleach TYBW anime, but it's hard to follow in the footsteps of Sōsuke Aizen.
Thhis does not mean that Yhwach isn't fun to watch. He is the extremely menacing leader of the Wandenreich army. With his godlike abilities, he is quite easily the most powerful threat in the Bleach series. There is a very ominous presence about him whenever he's shown on-screen.
However, whenever Bleach fans think about their favorite villains, chances are that Aizen will rank highly on that list. He played Gotei 13 like a fiddle with his genius intellect, charming personality, and manipulative powers. If Yhwach is an immovable object, then Aizen is an irresistible force.