There are a good amount of suggestions but they are all different so that doesn't really help anything.
I think a Tomodachi board is great. I know a lot of people bought it and it's a game that will get a lot of different discussions going. Getting the board up now.
I like Tomodachi Life too, but what we truly need is a couple of back-up games/classics we can have in advance like The Thousand-Year Door, The Wind Waker HD, and Super Mario Galaxy to name a few in case we have something like this again or perhaps have a double to make up for Oct. 2011.