I couldn't imagine the Lions being too concerned with which QB starts/plays for the Packers. Of course, ARod playing would be a complete surprise, but it's not likely, especially in light of MM's comments today.
Whether it's Flynn or Tolzien, I'd think the Lions will stack the box to defend the run, and depend on their front 4 for pressure on pass plays. That's nothing new, and I don't think it will change until ARod is back.