One player who will be making his preseason debut is Sen'Derrick Marks. I don't think he's anywhere close to roster danger, but I'll be interested to see how he plays. David Stewart is also officially active; I'm not sure how much he'll play, but I don't expect it to be much. Nick Schommer and Barrett Ruud also return after missing the Rams game. Schommer could use a big performance tonight to improve his case for a roster spot.
I'll be chiming in during tonight's game a little in the comments section and probably more frequently on twitter, as I'll be watching the Bears broadcast, and then with a recap post tonight and likely more tomorrow.