I could see that. She's got some thematic ties to Karsus, shares a home plane with Shar, and has a portfolio revolving around lost knowledge (ie, a potentially attractive avenue for recoving an amnesiac's memories) giving options for a subplot around her to resonate with a couple different origin characters. (And could potentially serve as a more "benign" (for certain definitions of the word) source of power to Wyll, if he wanted to retain his powers but escape his contract with Mizora.)