This, according to director Steven DeKnight, who revealed that his original idea was to have Pacific Rim 3 connect to the Monsterverse, which contains movies like the upcoming Godzilla vs. Kong.
Steven DeKnight took over the franchise from Guillermo del Toro with Pacific Rim: Uprising.
In an alternate universe, Godzilla could have shown up in the Pacific Rim franchise.
The original Pacific Rim, released in 2013, grossed $411 million globally.