I am just a new hire, so take this for what it is worth, but I was told at the schoolhouse 2 more August classes and one September for three more total. The rest are transition. Interviews are done. Decision board is done. They generally don't call for classes until a few weeks prior and they are super busy right now with new classes starting every week or two weeks plus captain upgrade. Everyone that received a call from a chief pilot should get a class spot in one of those classes.
We are reaching the deadline for the AirTran partition to be done, so I would expect the bulk of the training capacity to be devoted to that. To say that the schoolhouse is busy right now is an understatement.