It's probably nothing but...

Doctor DooM

If you freeze this trailer at 0.23/0.24:

https://www.youtube.com/watch?v=mKVLemud6Ug

The cyberman doesn't have the cybus C on him.

Old skewl cybermans?

pixelburp

Well unless they came up with another mcguffin reason for them crossing the Void, they would have to be "our" universe cybermen. So woohoo if true; hopefully there'll be come nod or explanation for them being from this universe

LordSutch

Remember these nasties?

The Cybermen also use smaller, cybernetic creatures called "cybermats" as weapons of attack. In their first appearance in 'The Tomb of the Cybermen', they resembled oversized metallic silverfish and had segmented bodies with hair-like tactile sensor probes along the base of their heads, which were topped with crystalline eyes. The Second Doctor described them as a "form of metallic life," implying that they may be semi-organic like the Cybermen, and that they attacked by feeding off brain waves.

The second model of cybermat seen in 'The Wheel in Space' was used for sabotage, able to tune in on human brainwaves. They were carried to the "Wheel" in small but high-density sacs that sank through the hull of the space station, causing drops in air pressure. These cybermats had solid photoreceptors for eyes instead of crystals. The Second Doctor used an audio frequency to jam them, causing them to spin, crash and disintegrate

Used to give me the willies, I always looked under the bed 'just in case' :eek: