When will we see our 1st Godzilla 2 teaser?

around mid or late 2018.

I'd say the earliest we can look at is Comic Con 2018.

^

If they release it online.

Probably Comic-Con 2018. We will most likely get more stuff like the Monarch timeline in the next year, but a teaser trailer will probs be at Comic-Con 2018.

Comic Con 2018 sounds likely, but if they don't release it online I'd say fourth quarter 2018.

G. H. (Gman),

Would it be likely in the Comic Con 2018 that we would get our 1st look at the new Kaiju designs (like Ghidorah, Rodan, and Mothra)? Or at least get a glimpse of the designs (like a brief glimpse of Ghidorah's wings or something)?

Maybe. Who knows? Studios are becoming less and less interested in big reveals at Comic Con by the year, so that could potentially affect what is revealed and how it is revealed--But anything's possible I suppose.

There will probably be leaks somewhere along the way. Hopefully until then we get some more monarch timeline hints and such.

Didn't Kong Skull Island didn't get it's first trailer until 8 months before it's release? Since Godzilla 2 is being released in the same month as Kong Skull Island, I would expect to see the 1st trailer around July of 2018. How likely is that guess accurate?

As likely as anyone else's guess I would assume.