Nintendo announced that there will be a new Nintendo Direct for Animal Crossing on November 2 at 7AM PST (10AM EST). The direct will cover the new update for Animal Crossing: New Leaf, along with new info for the amiibo support for New Leaf, and possibly news for the upcoming Animal Crossing mobile game. But I'm not sure as to whether or not we will see any information about Animal Crossing coming to the Switch.
Animal Crossing: New Leaf was released on June 9, 2013 for the Nintendo 3DS. A new update for Animal Crossing: New Leaf was revealed back during Nintendo's September Direct. The retail version will have an updated title known as Animal Crossing: New Leaf – Welcome Amiibo. Those who have already purchased the retail version will receive a free update. However it is unknown as to when update will take place, hopefully will learn more about it in tomorrow's direct.
Animal Crossing: New Leaf is available for the Nintendo 3DS.