So this just came up for the next year's circuit and it has some huge changes
tl;dr:
National Championships are gone.
Replaced by one of four big championship events: European Championships, North American Championships, Latin American Championships, and Asia Pacific Championships
Prize Pool of $250,000 total for each of the four
More spread out Regional Championships with better prize pools
http://www.pokemon.com/uk/pokemon-news/big-play-pokemon-changes-on-the-way-for-2017/Get ready for an epic year of competitive Pokémon TCG and video game battling at all levelsincluding the Championship Serieswith all-new events in the 2017 Play! Pokémon season. We're making significant changes to the program to improve players' chances to compete and win across the world. Take a look.
This year, we're introducing a new Championship Series event in each of the four core rating zones. The European Championships, North American Championships, Latin American Championships, and Asia Pacific Championships will take place throughout the season and are open to all players worldwide. These amazing events will feature high Championship Point payouts and a total prize pool of nearly $250,000 per event. In addition, Travel Awards and Stipends will be available to players worldwide based on Championship Point performance in their home rating zone. Travel Awards and Stipends available for each of these events may vary by rating zone and by age division. Stay tuned for more details closer to the events.
Pokémon Regional Championships will now be open to players around the world and will feature bigger prizes. Every Regionals will offer more than $50,000 in prize money, scholarships, and Travel Certificates based on attendance. These competitions will be spread more evenly throughout the 2017 Championship Series season instead of clustered over several weekends during the year, making it easier for players to attend multiple Regionals throughout the season. There are no residency restrictions for 2017 Pokémon Regional Championships; players are free to travel to foreign events. Travel Certificates earned at Regionals will be deposited to a travel account that winners may use as they wish.
City Championships will now be known as League Cup events. Participating hobby stores will be eligible to host one League Cup event per quarter, giving Pokémon TCG players more opportunities to play in their local area. The Championship Points structure for top finishers at a League Cup event will be the same as for the former City Championships. Also, Pokémon League Challenges will return as entry-level events, giving Pokémon TCG players a great place to get started and even more opportunities to compete in local events.
The Premier Challenge and Midseason Showdown events will return in the 2017 Championship Series season as local events for Pokémon video game players. Premier Challenges will provide players with frequent opportunities to play at local events and to try out new strategies in smaller events. Midseason Showdowns are larger events that will give players the opportunity to compete for a greater number of Championship Points in their local area.
At every event listed above, players can earn Championship Points to qualify for the most prestigious event in the Championship Series: the Pokémon World Championships. Championship Point totals needed to qualify for the 2017 World Championships will be announced in September.
Play! Pokémon will no longer host Pokémon State or National Championships. The Play! Pokémon team may approve independently operated National Championships on a case-by-case basis. The Championship Points and prizes available at these events will vary.
We look forward to seeing you at Play! Pokémon events during the 2017 season. Good luck throughout the year on your climb toward the title of Pokémon World Champion.
Stay tuned for more information on specific events during the 2017 Championship Series season.
tl;dr:
National Championships are gone.
Replaced by one of four big championship events: European Championships, North American Championships, Latin American Championships, and Asia Pacific Championships
Prize Pool of $250,000 total for each of the four
More spread out Regional Championships with better prize pools