The Top Cut is looking into hosting an event sometime after regionals. Probably during the Spring Battle Roads season or possibly in the summer so more people have the oppurtunity to attend.
I don't think you can just look at Nationals and Worlds as the only two events in a year to draw points off of. In one event almost anything is possible. As far as this year is concerned, I've seen plenty of old decks show up at tournaments. Infernape being one example. I believe you have to...