User blog comment:DiegoAnime3000/RWBY Volume 3 has gone into production!/@comment-14785746-20150621215817/@comment-4010415-20150621221500

Considering that they only just now started actual production, and RTX is in a couple months, there's no way in hell they can premiere it at RTX. Barbara even said during a livestreamed AMA that they won't be premiering it at RTX this year.