The fourth movie in the Cloverfield series is currently titled Overlord and based during WWII. I say 'currently' because the movies in this series tend to change. The third movie, originally titled God Particle (possibly Cloverfield Station now), was set to release in theaters in April, but now there's a chance it will be released to Netflix.
This series has always been mysteries, so even though it seems everything is up in the air right now I'm not worried! It's very encouraging that they've already filmed the fourth!
In other movie news: Marvel released the trailer for Ant-Man and the Wasp