It would be impossible to a total SW conversion as the SW Expanded Universe is so large. The mod covers more than enough, and at least has the major characters.
To be honest, I never considered the idea of mixing franchises or characters together. I don't see it that way.
My thought process for this mod went like this:
At first I wanted to make a new sound pack, to hear something different than AvP2's default sounds. I thought, hmm, I like Star Wars so I'll make a Star Wars sound pack. Then I thought, I guess I should add Star Wars music too. Then I kept adding more and more Star Wars content. Eventually I began to add character skins.
Not once did I think about the fact that I was merging two franchises together. I just focused on one thing at a time, in the same manner that any skinner who makes a character skin focuses on the skin alone, in which he/she isn't thinking about any conflict the skin may have with the realism or purity of the AvP universe (unless the skin is supposed to be based on something from the AvP franchises).
Only until the mod was around 90% completed (excluding maps) did I think about the fact that I merged two franchises together. However, I sill don't view the mod as such.
Basically, I view every file in terms of fun factor and the quality of the file itself. Not whether or not it "fits" with the game's universe. Thats what makes skinners like gh0std0wn, x-Mandalore-x, RaptorRed and I unique (this also pertains to some other modders and mappers as well). Almost every other skinner out there focuses on the same alien, predator, and avp themes. Therefore, we have more creative freedom to do what we want when making files.
Those who are stuck in the logic that mods/skins/maps should only be based on alien, predator, and avp themes wind up missing out on/not enjoying most of the custom content people create. These people are basically the ones that only like Projam, AJL, and skins and maps based on characters/scenes from the movies.
And there you go, I went off on a tangent.
I can see how you wouldn't like it though, as I don't like to see AvP in Star Wars games. But since this is a fps, I'm extremely flexible and allow anything to enter the game as long as it's fun and of high quality.