Will Godzilla 2 appear at SDCC 2015?

Probably not, because it's too ealy to show it on SDCC, I say we might see it on 2017.

^Maybe 2016 if we're lucky. ;)

I wouldn't expect anything honestly. But for those who want to wade into the absurd as far as rumors go:

MechaGodzilla to be Announced at SDCC 2015? 'Godzilla' 2 Release Date, Cast, Plot, Spoilers & Everything We Know So Far Here!

^Idk, that's seems a little silly, that only way I see it happening is a Pacific Rim Crossover, also people might think it's silly as well for such a dark, sorta realistic movie! Unless they can give the best explanation ever, I don't see it happening 

It is silly and likely just click bait. I've heard nothing of MechaGodzilla being in either Godzilla 2 or 3 outside of fan speculation.

We could possibly get some information about Godzilla 2 this year I mean they supposedly show a teaser trailer at last year's SDCC so anything is possible for this year.

^

I don't think so.

I say we might get Godzilla 2 info somewhere late 2016 or early 2017.

We are far more likely to get a Pacific Rim 2 sneak peek then a Godzilla 2 sneek peak.  I wouldn't hold my breath...

However... Shinji Higuchi WILL be at SDCC promoting Attack on Titan.  As unlikely as it is, maybe he has, well... something MORE up his sleeve...