The Vikings, in theory, will face a familiar foe at Soldier Field on Sunday.
When they fired up the film on the Chicago Bears this week, they saw the same classic navy, white and orange uniforms. They recognized Jay Cutler, Chicago's strong-armed, slumped-shoulder quarterback. And they spotted Matt Forte and Alshon Jeffery, two playmakers who have given them problems in the past.
But so much has changed for the Bears since the Vikings last saw them face-to-face.
The Bears during the past 10 months have hired a new general manager, changed coaches and remade their roster, especially on defense.
"We're battling, and there are a lot of changes," said new Bears coach John Fox, who previously oversaw overhauls in Carolina and Denver. "You've got players learning new systems in all three phases, players getting used to the coaches, coaches getting used to the players."
The Bears let outside linebacker Lance Briggs and cornerback Charles Tillman, Pro Bowl performers and longtime defensive leaders, walk in free agency. They cut veteran center Robert Garza, who snapped in their last Super Bowl appearance in 2006. They traded talented but outspoken wide receiver Brandon Marshall.
They brought in 13 unrestricted free agents, including pass rusher Pernell McPhee, slot receiver Eddie Royal and starting safety Antrel Rolle. Cornerback Tracy Porter, another starter, was signed after getting cut by the Washington Redskins.
The changes didn't end when the season started. After the Bears started 0-3, they traded former Vikings defensive end Jared Allen, a misfit in their new 3-4 defensive scheme, for a draft pick. They also dealt linebacker Jonathan Bostic and cut safety Brock Vereen, another former starter. Vereen is now on the Vikings' practice squad.