Since it looks like there going from z to a and there usally teams with cold weather a lot. I'm guessing in 2018.
They already have: Jan 1st 2008, Buffalo's Ralph Wilson Stadium, first Winter Classic to be played, not to be confused with the Heritage Classic
January 1, 2008 in the 2007-08 season at Ralph Wilson Memorial stadium in Buffalo, NY.
Greame somthing