Saw an interesting post on reddit the other day. Remember this screenshot from the Kaguya filler episode. Look at the guy at Momo left.
Turns out hes no so filler after all. In one the Boruto movie interviews some points were detailed out. Info is in the spoiler.
Therye were originally supposed to be 3 but one got scappred for whatever reason, keep in mind the anime pic with all 3 villains came out several months later after the movie. This probably means SP still has plans for him and when they make another movie hes probably the next villain. Heres the reddit link
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