All this talk of souls, what if The Rock utilizes Papa Shango? I'm remembering the Shango vs. Taker feud and Taker interrupting the match last year.
Also Wrestlemania is in New Orleans (Voodoo) and Shango was in the N.O.D. (as Mustafa) so that's another connection to The Rock.
Edit:

ignore this post. I'm thinking too far ahead trying to connect dots.