I'd have to go with Bly starting the season, his experience will get him the job, unless of course he really sucks in TC and Pre-season. I think the depth chart will pretty much be:
Hopefully one of our undrafted rookies will earn the 5th spot on the team, unless Hudson can hold onto the job as a CB/Safety. I'm hoping Roman gets the axe, I'd really like to see what Reggie Smith, Curtis Taylor and Marcus Hudson have to offer.
It does look like we are going to have a good battle for the last CB spot though:
And I wouldn't quite say Shawntae Spencer's job is safe. If he even gives a hint of an injury, I would think Spencer would get the axe, hes missed too much time over his short career.