Kristen was such a big part of the original Possession and it would be a way to tie in what was a seemingly pointless plot from a few years ago. Maybe Lani could be first to suspect something or Kristen needs to be part of the exorcism and 'redeems' herself. Again, Eric would be useful as well.
Tell me about it. I loved the short time Katie took over Spencer Publications right before/after Ridge came back. Why did they have to make her forgive her sister and her husband. She should've destroyed them.