I even consider them slight favorites. I've seen them play, I've seen Juve play. They play better and their players have more experience in the CL than ours, with certain exceptions.
They are back to the winning ways finally, and looking at their squad, in particular the one that beat Freiburg last week, the starting XI had 7 players who started the CL final against Bayern, while the 8th one who started vs Bayern (Blaszczykowski) was on the bench against Freiburg. They are only missing Grosskreutz, Bender and Lewandowski from that final. Add Sahin, Mkhitaryan, Kagawa and Aubameyang, and I can't see what makes us favorites. In fact, this is a team that can easily beat the usual CL Juve. Reus and Dortmund's form came back in the worst possible time for us.