There is customization and the way it works is you first choose a trainer class (Breeder, Rich Boy, Hiker, previous protaganists etc.) and then change them to a design you like. The trailer just showed a basic Ranger and Hilbert with slight customization probably because using a bunch of different avatars may confuse the viewers or something.
However, seeing as though we got Lucas in Sinnoh, who looks like concept art for Red, we may *shudder* get sunglasses Hilbert.
But I don't think I've ever seen this much hype for trainer customization, so....idk that probably means nothing.
Oh my Arceus I forgot the most important thing a pokémon fan wishes for future pokémon games....pokémon.
-Armajay (Armadilo plus Blue Jay, I know, GENIUS)
-Water type reptile
-Another pony. Why not?
-A pokémon who evolves into 4 different pokémon, depending on the season, or this could be implemented into the eeveelutions (Autumn/Spring = Bug Eevee Winter/Summer = Steel Eevee)
Yeah, bad eeveelutions but someone....you know....come up with better ones.