https://youtu.be/Q7kcGW-rNuA

As you can here, this is the trailer. But if you slow it down at 0:03, Mechagodzilla can be seen at the top and a little to the right, looking almost exactly like Godzilla, but he does glow red at the neck. Also, Godzilla's Atomic Breath does not look right compared to the other two movies where it has looked at least a little fire-like, as shown in the end of the trailer, and Godzilla's Atomic Breath size changes when he was shown underwater if you slow it down.