Found this bit of news on Ben Moody (Ex-Evanescence Guitarist). It goes along with the songwriting process Stapp's been doing for "Passion."
** And though he's (Ben) doubtful there'll even be a soundtrack to the controversial Jesus biopic "The Passion of the Christ," he and Evanescence songwriter David Hodges were asked to write something for the film, which they did. ** - Source: MTV.com
So it sounds doubtful, but there could be a soundtrack of various artists for the "The Passion of the Christ." I already saw that they have an orchestrated cd for the music in the movie, but maybe Ben and Scott would be featured on an album that's like music inspired by "The Passion of the Christ." Hmm...who knows?