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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Star wars all day, there were force user who could move PLANETS. Having all of the most powerful force users from the star wars universes fighting against one common enemy would be absurd. Oh and that isnt accounting for all of the fleets that have destroyed entire planets (Not even counting the Death star which would be a tremendous threat). Star wars would obliterate them.