Earlier this week, we learned that Jurassic World's sequel will be directed by J.A. Bayona, who's The Impossible, The Orphanage, and A Monster Calls. Now, the film's official Twitter account just dropped a teaser poster, and hinted at a name change.
— Jurassic World (@jurassicparkiv) April 23, 2016
A fan site found a recent interview with Bayona, who confirmed that the title of the film would be something other than Jurassic World 2, which the poster certainly points at.
So, what could it be? I'm rooting for Jurassic Ops, where they drop a couple of velociraptors in a war zone.