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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Just think of the fleet that invaded reach... That was huge! Not to mention that wasn't a quarter of the covenant fleet. Then you add in all of the Spartans on harvest, the ones on reach are just a couple thousand right there. Plus all of the UNCS fleet and armies. Then we'll all of the halo rings...