NMS was not on the E3 list even before it was pushed back to new release date which was OK since there was short time between E3 and June 21. But now I hope it will show up with new trailer or gameplay, but knowing Sean i doubt it. Maybe Sony will request the new trailer to keep the hype since change in release date, but time will tell.
I agree with Padrino, but it is Sony that can ask for more stuff to be shown at E3 to keep hype up. Many were disappointed with release date change and were really pi**** so maybe they want to do damage control (if any damage occurred that is).