Would you be interested in a game that consisted entirely of regional variants? A new region, with a regional dex that added new regional forms for every Pokemon in it.

ITT: Share ideas for such a game. What would the region be like, what new regional variants would there be? Since it wouldn't be the main game of a generation, how much would the game follow the general structure of a main series Pokemon game? (Is there a league, evil team, etc. How plot-heavy would it be?)