OK, I agree with your multiverse theory, though I didn't realize Khan was preordained not to appear in TBG. Is this a hard-and-fast rule? Because I was going to suggest some Last Temptation of Marla by a guest appearance of Khan. :c)

Spider-like is too close. If she has 8 legs and/or more than 2 eyes, we're going to have a problem. :c}