Re: Crossover with other franchises?
Taran'atar did fight an alien that appears to be a Xenomorph in one of the DS9R books, I can't remember for sure which. That would indicate that something similar to them does exist in the Trekverse.
They say a little knowledge is a dangerous thing, but it is not one half so bad as a lot of ignorance. - Terry Pratchett, Equal Rites