Damn... in my map its sort of a "movie" scene and having her get attacked wouldn't really fit in with what's going on. I guess I could always have her say "LOOK!" and have a center view trigger look away while I remove her and replace her with a cloaked Kerrigan. But that would make her seem less cool, knowwhutImean?"
Any other ideas?
ADDITION:
OOOO!! I could have her walk behind a tree as she's talking!!! There I could remove and replace her without the player seeing it. You wouldn't hear the sound of the cloak activating, but it would accomplish what I'm after! Thanks anyways, Voyager.