Wow. Over/under on number of monsters in this film? Just Godzilla? The video shows a weird foot like thing stamping down on the ground that doesn't match a part of Godzilla.
edit: After rewatching it there are some strange things at 1:33 which looks like something with folded wings diving or falling into the ocean. 1:48 there is something knocking fighters from the sky, and the setting looks similar to the scene from 1:33. 2:07 is the weird foot thing, that looks like the edge of a bent wing, sort of how a bat walks on the ground.
I would enjoy if Ghidorah makes an appearance, though with an altered appearance deviating from the tree trunk form in the past. If there is another monster with wings, my money is on Rodan. The Destroyer had wings, but it basically an unknown, so highly doubtful.
Ok, did a bit of digging. Minimum of 2 monsters is
the rumor. I'm sticking with Rodan.