I've been reading all sorts of things of late that seem to want to tie these three movies together (some are using the term "Cloververse"), despite not having the same directors, producers, etc. The most recent was today, which implies there's a connection.
While it has yet to officially be confirmed by those involved with the film, a running theory connects the two monsters seen in Paradox to the original Cloverfield monster.
In a blink-and-you'll-miss-it moment during the film's first act, a silhouette resembling the original "Clovey" appears to be seen walking through the ruined city, just as Michael (Roger Davies) rescues Molly (Clover Nee).
Are these three films actually related? Are they just building on the vagueness of the original? If there is any connection, was it intentional?