The only problem with your approach, is that it might cause false expectations to the candidates waiting in the limbo. The selection process must be well explained in order to avoid that issue.
The submissions received will be reviewed periodically by the content committee starting on July 5th. Sessions approved will be communicated to the speakers and published in a draft schedule asap. The final deadline for submissions will be September 13th but the sooner you submit your proposal the better chances you will have to get a slot. The final schedule will be published on that week.