[KRWolfblade]

Also another thing to note is that the Twelfth Doctor mentions Marinus as a place where the Cybermen haven "risen" naturally. For those who aren't "up to date" with the classic era, Marinus is the homeworld of the Voord which were featured in the First Doctor's era. However, in a comic strip for the Sixth Doctor called The World Shapers, the Sixth Doctor, Peri, Frobisher, and an elderly Jamie McCrimmon (who, by using a technique the Second Doctor taught him, remembers his adventures with the Doctor) find that the Voord have taken a Worldshaper to quick-evolve themselves, turning into Cybermen as they gradually replaced themselves with cybernetic parts. When the elderly Jamie sacrifices himself to destroy it, it creates an explosion that accelerates time and the Sixth Doctor and his companions return to find that a million years of geological development had occurred straight after the explosion and transformed Marinus into Mondas.

For obvious reasons, the canon of the comic was put into doubt as it contradicted other sources and wasn't really absolved. Until the Twelfth Doctor mentions Marinus.

So do you think that The World Shapers is partially canon (except for the whole Marinus evolves into Mondas since the Twelfth Doctor names them as separate places where the Cybermen evolved)? I think maybe since the Doctor mentions Planet 14, Telos, and Earth (Pete's World/Cybus Cybermen) as other locations where the Cybermen had risen and they are key locations that are relevant to the Cybermen throught Doctor Who's history.