Just a note. DimensionalWarrior is not talking about US Nationals, but Nationals of other countries that have to be done sooner.
You can expect to see this soon, if I'm not wrong:
"ADVANCED FORMAT LIST EFFECTIVE APRIL 1"
Then, all Advanced Format Tournaments done after March 31 will have to abide by this new list, including US Nationals and World Championship.
chaosruler, the new ban list will be probably known by March 1st, when it gets released in Japan, assuming that we will keep the same list.