Greg Jennings I can see to some extent, in his prime, he was a formidable threat who's all around attributes are up their with the best receivers in the league but in recent times, injuries have stemmed said production. If the Packers are so willing to ship him out, should that not be a huge hint that it's a risk?! Admittedly their receiving core has become vast but still, at his best, the guy should be able to hold off players such as Cobb/Jones etc.
As for the serious interest in Urlacher, initially I thought it was a joke if I'm honest

You cannot be serious? The guy looked like a battered old man last season, sluggish and weary, not to mention the fact that he's been injury plagued for many seasons prior now. Now I know he could be a huge asset in terms of experience but the guy's not going to take a deal to sit around on the bench, why downgrade? Our current corps is stronger as it is.
Once a perennial Pro Bowler, I can't lie, I respected the ferocious version back in his hay day but he's coming to the end.
As I've always uttered, the prospect of seeing former fan favourites of arch rivals flourish in the purple is enticing, but I sadly don't see it highly probable in either of these scenarios.