What do you think about Neo Champion in general. Not talking about their design, Units, Meta just general concept wise. Also which region in future you'd like to come as next. :
Champion Battle - Pokémon X & Y Sheet music for Piano (Solo) | Musescore.com
Create a Every Mainline Pokémon Battle Theme (Champion Ver.) Tier List - TierMaker
Pokémon X and Y- Champion Diantha Battle Theme (Remix) - YouTube