>>40486892>>40486987Affleck only played to the 4th gym. There could easily be more depth to Eternatus than it being purely "evil". Could be just as grey as Darkrai, Giratina or Yveltal.
As for what it is, I like the idea of it being at least flying/dragon type and being in the air given the Zacian/Zamazenta reveal clip. I don't think the giant depicted on the mountain is Eternatus, and is instead Meteodyna, the one referenced by that smaller asian leak (can't remember if it was japanese or chinese or whatever) that came around the same time as Affleck and called Nessa's japanese name, Team Yell and a "Meteodaina" which clearly is meant to be MeteoDYNA as in DYNAmax.
For Eternatus, if the wolves really are Geri and Freki, I would love a two headed all knowing raven monster based on Odin's ravens Huginn and Muninn.