Looks like we're getting four commentaries on the season 3 set.
Audio Commentary with Ron Moore on “The Bonding”
Audio commentary with Ron Moore and Ira Steven Behr on “Yesterday’s Enterprise"
Audio Commentary with Rene Echevarria and Jonathan Frakes on “The Offspring”
Audio Commentary with Ron Moore on “Sins of the Father”
The Best of Both Worlds Blu-Ray is getting its own audio commentary with Cliff Bole, Mike Okuda & Denise Okuda, and Elizabeth Dennehy.