This may be indicative of Trevorrow's plan to keep as much of the film hidden away as possible in light of recent plot leaks. The dinosaurs, of which there will apparently be at least one new species, are what fans have the most interest in and keeping them shrouded in secrecy is probably a wise move. We may not see the creatures in full until a teaser trailer arrives, and maybe not even then.
Starring Chris Pratt, Bryce Dallas Howard, Omar Sy, Ty Simpkins, Jake Johnson, Nick Robinson, Irrfan Khan, Judy Greer, Vincent D'Onofrio, and the returning BD Wong, Jurassic World opens June 12th 2015.