Answer: Yes.
As is tradition. MMOs give us stuff we need to punch, and that means using hostile versions of any given visual kit.
There's a trope for it.
Even the What's Next panel made fun of "boy, sure would suck if there's division." If there's a faction in WoW, it has division and a bad version.
Maybe. I get the sense this is going to be a 2 raid expansion to accompany the faster timeline, but I could be wrong.
If they are the second raid, though, maybe Xal turns to corrupting the light crystal which ends up meaning she allies with them.