There's been some commenting about why DVDs are released so close to season premieres before in general and also in relation to the Sons of Anarchy release.
At least in the case of SOA, HitFix's Alan Sepinwall got an answer. Like Alan, I'd figured it was a way to use the DVD release to market the new season. But guess what?
As it turns out, I got it backwards, according to FX president John Landgraf.
"The studio wants to piggy back on the show’s marketing for the subsequent season," Landgraf explained to us after the podcast. "They need to place and sell a bunch of DVD’s quickly and that seems to work for them if they go right around premiere. We’ve tried putting out seasons earlier so that people have more time to catch up in the off season ("Damages" & "The Riches") and it didn’t seem to work for either the show or the DVD sales."