A company of Space Marines end up in Marvel/DC. What happens next?

[Dr Will Hatch]

Through a one in a billion freak occurrence caused by The Warp while in transit, a company(About one hundred) of space marines from Warhammer 40k end up stranded on modern day, twenty first century earth in Metropolis(DC)/New York City(Marvel). Because their ship was destroyed in the process of the Warp spitting them out all willy nilly, they seemingly have no way of returning home.

How do these hardened fanatical warriors from the far future react to their new surroundings?

[Shai-Hulud]

There's plenty of aliens on earth for them to hunt down and excommunicate (permanently, that is).

Wouldn't want to be an occultist or black magician should they drop by either.