like people pointed out in the trial thread, the person who muredered Wanda at the gala is good enough to fool Rachel with her chrono-skimming and trackers like Logan, Daken and Laura.
the solicits for issue 2 says there's something wrong with the body, this either could have an interesting twist like someone like onslaught or someone with magic knowledge killed her or some basic writing/mess like mystique turned into magneto and chocked her