So basically if the order remains "unfulfilled" by May 15 file a support ticket to find out whats going on - before that, it's a "please, be patient" situation.It may take up to 10 business days for your order to ship.
After every event they have thousands of orders (in this case also including Nova-111) to ship which probably is a bit of a grind and for all we know they might be doing the single item orders first.
I got a shipping confirmation email for a single standard DB-CS from the morning batch on May 2 (the order is marked as "fulfilled"), the tracking went active May 3 ("Data Received") - but past that, no new developments. Typically I have to wait approximately 4 weeks after the event before I have the game in-hand (or longer if they have an exhibit at a "trade show" right after the event).