Hey lifelong Godzilla fan here (Mom had showed me the original when I was like 4 or 5 and got me hooked.) it's my favorite series so I'm glad I found this thread.
So catching up on the latest, it looks like Spacegodzilla has probably been confirmed for the next Monsterverse movie. I assumed he'd be involved when the title was announced as "Supernova". I've also seen theories that Godzilla himself will become Spacegodzilla from what happened in New Empire.
Godzilla Minus Zero is also in production. After Minus One I had heard that the director said the sequel would continue with the plot of the main woman having been "impregnated" with Godzilla's cells so it should be interesting to see how that plays out.
And there will also apparently be a Godzilla anime that features a boy who has been given Godzilla's abilities to some extent (Like Kaiju no 8.) I'm personally hoping that there will be a Girl (or twins.) with Mothra's abilities.