Although we are yet to see Godzilla as a whole, we are able to see the results of the train station shoots which occurred a few months ago. This certainly seems ominous!
Coupled with the head design finally being released, I think we are about to learn a whole lot more.
It should be noted that Toho definitely seems to want this to echo the 1954 film - The current head design for ShinGoji heavily resembles the ShodaiGoji, and the trailer ends with Godzilla's classic roar and footstep sounds from the original film.