Before mentioning an event like this in a story in a set universe, you'd say there would have been taken measures to explore this, after all, it was a professional writer who did the story.
ofcourse, claw marks and victory streak are not in line as well, for example maniac's origin differs
you might take a look at the wing commander academy cartoon, there are alien pilots on the claw, transferred from the trafalgar, like the guy who looks like a fish,
and payback does not look completely human. they had encountered other
races, and were not suprised to find intelligent life on other planets.
there should be a "bible" somewhere. when you are doing multi-million dollar
productions, you do not have your writers making up historical events on the fly.