@iflyhightohigh
The batch joining on the 8th of July are not interviews or CASS
They are LOI holders who were selected in back in late 2011 and done with their type rating
The 8th of July date is the day they officially join the IndiGo as a Junior Co Pilot and it starts with ground classes in Gurgaon
As Bhambri mentioned above the backlog for LOI holders go on upto March 2014 after which there are no more LOI holders left to join