Winston looked pretty good last week against the Falcons, but I don't like him on the road against the Panthers. It sounds like potentially nasty weather Monday night in Philly, around 30 degrees, 20 MPH winds with gusts to 30+. You also need to make sure they have something to play for in that game (if Vikings lose to the Packers tonight, Philly locks up home-field throughout the playoffs).
I think Bortles might be the safest play, but I have a hard time recommending him in a championship game. I'd follow that Vikes game and the weather report for Philly.