À side note, I mean between humans, covenant, and flood versus star wars, only the flood has a chance. If you bring forerunners into the picture well then you have a good battle. Forerunners would win, they are more spread and numerous than the fractured star wars universe. Now, for precursors their power was unreal, they were killed off by the flood, thanks forerunners, you reap what you sow. Karma So in the end that question is if the star wars universe could survive/wipe out all traces of the flood?