Anyone between and including (not exclusive) Milo, Kabu, and Gordie. These are wants.Who do you want to/think will be the next Galar Gym Leader to show up?
For me I think it’ll be Nessa or Kabu. As for who I want, those 2 or Piers
Can't really make any speculations as to who I think, though. Probably not gonna be able to tell until the preview/summary/etc. comes out that directly indicates something.
EDIT: And Opal. Give me Opal!