WWE has booked Eve Torres for WrestleMania weekend. As Dave Meltzer noted several weeks ago, WWE had reached out to several women from the past about returning to the company. It's not clear if this is a one-shot deal for them to appear on the show or for future work with the company or for WrestleMania Axxess appearances.
Kelly Kelly has already stated that she would be at this year's AXXESS. She will also be at the WWE Hall Of Fame ceremony and she has hinted that she might be at WrestleMania.
I'm not 100% sure why they are calling people back for Mania weekend but one person hinted to me that the names that have been called are people that were close with Nikki Bella.