Originally Posted by
ItsChrisRoss
I wondered that. And its a simple answer. In the Cloverfield Paradox, it states that the particle accelerator can rip holes in our dimension, other dimensions, and ultimately bring monsters, beasts, and creatures not just to our time, but to events in the past, AND the future. SO basically its like this:
Cloverfield Paradox happens. This causes Monster to crap all over NY in Cloverfield 1, also causes monsters/aliens to appear in 10 Cloverfield Lane. They picked a super easy thing to capitalize on. Those two movies happened 8 years apart from each other, and in the universe, so WWII era could easily have monsters inserted into it as a reaction to the particle accelerator in Paradox.