In the new Animal Crossing, I want the online to be incredible. Like having your friends be able to live in the same town as you and play as you are playing. Doing tasks with your friends, going shopping, fishing, and stuff like that.
I also think it would be really really awesome if they had the weather from your forecast channel be the weather in the game. Like whats going on at your house is going on in the game.
I think the use of Mii's would be cool too.