I don't know exactly how credible this is but it looks like the guy spent a lot of time putting these things together so I doubt he is completely talking out of his ass.
TUF 8 Light HeavyWeights 14 of 16 Updated with PICS and PREDICTIONS on Winners!! - Sherdog Mixed Martial Arts Forums
TUF 8 Lightweights 16 of 16 Updated with PICS and PREDICTIONS on Winners!! - Sherdog Mixed Martial Arts Forums
This is the only thing I could really find that had a lot of possible fighters for the next season. Anyway I didn't see anything on these forums so I thought I would post.