With Animal Crossing New Leaf being priced at the Nintendo Selects of $19.99 during the summer, Nintendo announced a Fall update to the game, with turn 4 years old on November 8th, 2016.
Now the update includes, new Amiibo and Amiibo card functionality, new villagers, some Splatoon content, and Sanrio and Hello Kitty Amiibo cards (from the Japanese AC Nintendo Direct). We will also get complete details where we will see these in the US.
There will also be announced a new version of the game called Animal Crossing Welcome Amiibo with all of the updated features and includes an amiibo card from the new set of cards commemorating the update.
You can find out all of the information and watch the Nintendo Direct right here