[POTENTIAL SPOILERS] My predictions for GvK

Just some thoughts I thought I'd share based on what we know thus far.

I think that the mystery winged titan is Titanus Quetzalcoatl, given how it seems to combine features of a snake and a winged organism.

The "Mega Godzilla" armor is just a toyline exclusive, like the old Trendmasters' Power Up Godzilla figures, and thus, I am not too terribly worried about it.

Godzilla and Kong's rivalry will disorganize the Titan hierarchy, leading to them having their own battles with each other. Which leads me into my last idea...

Mechagodzilla will be an attempt by humanity to create an Alpha Titan of our own, in an effort to gain control over the Titans once and for all. Not only will he be built around the skeleton of Dagon, but he will also have King Ghidorah's final head–or more precisely, its brain–as a control unit, making him a cyborg. Just enough of a living creature that the Titans will count as one of their own, but undisputedly in our control. In theory, anyway, because we all know how these things usually go down.