The trailer I first saw begins with the HGW prologue about us being watched by “intelligences cool and calculating across the reaches of space”, so there will be something alien about them.
Seeing the previews with the lightnight strikes, the EMP effect knocking out the power grid, & the underground upheavals- I am guessing that something alien seeded “the invaders” and the lightning strikes somehow activated them to emerge from underground.
For me, the rock opera with Richard Burton as the narrator was the definitive translation of the story into another medium. If they can get even half as good as that, then they’re solid.
I predict that they will modernize how the aliens are defeated - instead of being done in by biological diseases, they will be taken down by a computer virus, delivered from a Mac into their mothership.