Well, the NHL is currently trying to fit an outdoor game inside Yankee Stadium in New York City, something they've been attempting to orchestrate for several years.
Another possible venue?
How about Dodger Stadium in Los Angeles.
Granted, other cities/venues are being considered, as mentioned, but both New York City and Los Angeles, and their respective MLB stadiums, have already been discussed.
New York makes sense, geographically and climatically, but I'm sure many will question LA. For the record, I'm all for it. An outdoor game has been staged in Las Vegas, and the outdoor ice rink they have right across the street from Staples Center is impressive.
The NHL might not want to explore more than two outdoor games, in addition to the Winter Classic -- and I'd be surprised if there are more than two in 2014, the League might be better served easing into this -- but they are considering all of their options, including alternative dates and times.
There has also been talk about staging a game in each of the seven Canadian NHL markets, Minnesota, Denver and Washington -- Philadelphia, Buffalo, Pittsburgh, Boston and Chicago, all of whom have already hosted a Winter Classic, are also options for future games.