You're kind of asking for a lot of research here, and, what's available is up to the whim of management. What are your "desired bases"? I don't mind looking at a couple. Also keep in mind, this changes constantly we don't "displace" based on seniority so if three people leave ORD (a historically senior base) and there aren't three bids for it, it could theoretically go to a new hire.

The "staffing update" for Feb is out, it indicates the most openings would be (desired bidders - current bidders)
IND 4
CMH 7
EWR 1
ORD 7
SDF 3
Again, keep in mind, this is all kind of abstract. Management will decide at the time of your bidding where they want to put you and your classmates and you'll be placed in those bases based on your bid picks in seniority order (date of birth)
Moving to your desired base as an FO really shouldn't take very long either way.