3 AUGUST 2014
I do, however, think it will happen soon as opposed to 2015 - so stay on top of your email game. If you opted out of CCI emails, make sure you opt back in.
For those of you who are wondering what Pre-reg is, it's the first sale of 2015 Comic-Con badges and it is only open to those who had an attendee badge this summer. If you didn't go this summer, or you were there as an exhibitor / professional / some other category, you're not eligible for this sale. You can try for an attendee badge during Open Registration (which will happen after Pre-reg.)