According to the Comic-Con website, what was planned for the preview night:
Comic-Con International and Warner Bros. Television proudly continue their annual Preview Night tradition, with exclusive world premiere screenings of the pilot episodes of three of the most highly anticipated series of the 2014-15 television season -- The Flash, Constantine, and iZombie -- as well as a brand new episode of Teen Titans Go!
Source:
However iZombie was not delivered:
The iZombie pilot that was promised wasn’t delivered, with a Warner rep saying “cast changes” are responsible and only a clip would be screened.
Source:
