Under the terms being negotiated, TNT will buy the seven episodes that ran last spring as well as the six new episodes that Warner Bros. and John Wells Productions made for NBC. The show is not going back into production because TNT will decide whether to order additional episodes of "Southland" after it sees how the drama performs. The show isn't expected to make its cable debut until after the new year, and the new episodes might not run until late February or early March.
via Los Angeles Times.
That's pretty much what I expected the deal to be. TNT salvages the episodes already produced and waits to see the ratings until ordering more. I wouldn't bet on that happening, but the deal means the chance is no longer absolutely zero.