I'd be interested in seeing more, so that's another "Yes" from me. Certainly this is just a little too intriguing to be left with just a starter...
So, whatever Zack and Cloud are in this universe (the equivalents of SOLDIERs, I take it - signet knights?) seems to come with some mental abilities. Cloud's apparently telepathic and/or precognitive, while Zack is preternaturally charming and charismatic. Plus there's apparently some kind of extra energy to be used when fighting nasties (and which possibly draws the nasties to them as well...) which needs to be resupplied by eating and sleeping. Sounds as though Sephiroth has two wings in this particular universe as well (a lopsided silver griffon would be just *too* conspicuous). I'm all curious now. I do hope you're going to write more of this.