Who wins?
By entire, I mean EVERYTHING. Halo, for example, would have all of the Precursors, Forerunners, Covenant, Flood, and Humans all teamed up against ALL the Star Wars universe
They all have their technology as well. Halo has their Halo Rings and such, Star Wars has all their Star Destroyers and Death Stars and all that
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I'n only saying Halo because of the fact of the Flood. It has been said time and time again that the only way to kill the Flood is to kill their food source, they are FAR too ubiquitous, even possessing forms that can fight without infecting a host. And they gain all knowledge of their host as well, they themselves would be a force to be reckoned with.