Certainly not a new model so soon after a price cut, it would be a really stupid thing to do to piss off all those early adopters once more. A lot of them are already pissed off with the price decrease and the ambassador program isn't much good to them. Its Japan Nintendo so maybe no announcement of certain games being localised for NA.
There are rumblings of that MMO single player game which I would suspect be Pokemon if they're going ahead of it. A proper main entry Pokemon game is a system selling, not one system it has appeared on has been a failure. Or maybe something else that requires subscription.
Not expecting a new Zelda for the 3DS, they've yet to wrap up production on Skyward Sword and announcing a game that could be years away didn't work so well with SSB 3DS/WiiU. I even expect the Wii U to get an all new game first as they've talked about a possibility of a game on there more.
Shit I don't even think it'll be anything worth writing about, we've had many "big Nintendo announcements" that have turned out to be nothing.
This is a much better source with slightly more details:
http://blogs.wsj.com/marketbeat/2011/08/23...nt-fuels-hopes/