And as for the arena in each city, there will be a set of Colosseum-style battles against several trainers for each arena, somewhat similar to the Battle Tower but in front of an audience and with an announcer, so more akin to the console games' battles.
You should probably add that first part in your first post within the story section.
As for deciding by personality test, very original. I don't think I've seen that before. Can't wait to see which pokemon you are capable of getting. Me personally, I like non-traditional starters.