Just wanted to quickly point out that this new design for Ash, though it harkens back to the old artstyle we just moved on from, goes beyond just simply putting XY Ash in OS clothes and calling it a day. Using BW Ash as an idea for what he possibly would’ve looked like had that happened (and as you can see, looks very different from what we’re seeing for the movie) .
M20 Ash’s features are slightly less angular then XY’s (though not full soft boy like in SM) and his eyes are a lot less wide, it actually does harken back a bit more to the OS/AG/DP days of how Ash looked, complete with the brown coloring being a tiny sliver on the eye rather then bring clearly seen. I think this was very much purposely done to capture that “classic” feeling.
People forget Ash underwent a design change way before SM during the DP/BW transition where Ash was made to look more younger and childlike (mostly by softening up some of his features and making his eyes bigger and brown) so going fully back to their roots will be very important in making the movie feel more authentic imo.