As Pokemon's regions were based after real world locations, the last three generations were based on regions outside Japan. There was New York (Unova), Paris (Kalos), and Hawaii (Alola). What country would you like the next one based after?
If there's any country I would like to see a Pokemon region based on, it would be Russia. Since I am a huge fan of ice pokemon, an icy region wouldn't be so bad. And while we see more ice pokemon, we could also see a glowing tetris pokemon, a matryoshka pokemon, and fur coats as character customization options. Russia is also where the Nutcracker Suite is composed, so maybe some pokemon based on what the Nutcracker Suite is based on.
Definitely Arlen Texas. I'd like to see that pokemon trainer try to tell Hank that his Charizard's flaming tail doesn't run on propane or something asinine like that.