While I love the Xenogears soundtrack, I really do not think you should not be the one to start it at this point. I don't mean to insult you or anything, but the better-known you are, the more star power you're going to get on this project. I'm sorry to say it, but you don't have the noteriety required to start a Xenogears project which would come anywhere close to doing the OST justice.
I really don't mean to insult you; I don't mean to suggest it's your fault that big-name remixers aren't going to rush to join this project, it's just a simple fact about the way projects generally work; if you aren't well-known, you won't get well-known mixers on your project. And Xenogears has a soundtrack which fully deserves to have top-calibur mixers if there is to be a project.
That said, if this project does get off the ground and if you can convince me that it will be any good, I'll talk to PriZm and the Prophet about redoing our old mix of "Gathering Stars" for possible inclusion in the project, if you're interested.