I don't see a connection unless you imply that the meteor or asteroid that destroyed the dinosaurs instead brought a deadly cargo inside which is the Death Angels and then they wiped out all major life forms on Earth. Well I suppose in that sense its plausible but then how would you explain how the marine animals and flying animals go extinct as well? In the films, it is shown that they can't swim. It is also never shown what their life cycle is either, how do they die? What do they eat? They kill everything else around them and then they all die of starvation?