So the villain's name was revealed and he is an Otsutsuki, but here's what I think his intent is.
-He wants to revive his mother, in order to do so, he needs a vessel from the Hyuga to do so. Thus he has Hanabi. I can't think of a reason he wouldn't use Hinata though, but possibly either because Hanabi shows the true potential of the Hyuga like Neji did. I kinda imagine Hanabi's potential, being the youngest in the clan, to be as potent as Sasuke's (at least that's why I theorize to be portrayed).
The way he plans to do so, is that he is going to make Hanabi eat the fruit from the tree and become Kaguya.
-He wants to revive his mother, in order to do so, he needs a vessel from the Hyuga to do so. Thus he has Hanabi. I can't think of a reason he wouldn't use Hinata though, but possibly either because Hanabi shows the true potential of the Hyuga like Neji did. I kinda imagine Hanabi's potential, being the youngest in the clan, to be as potent as Sasuke's (at least that's why I theorize to be portrayed).
The way he plans to do so, is that he is going to make Hanabi eat the fruit from the tree and become Kaguya.