Every what-if story is going to involve "and X also happened" to make the plot fall together, though. It's just a question of how plausible that X is given the previous what-if event. And I think there are more than one plausible X's that can drag Cloud into the story, e.g. the Turks stumble upon him at the train station, recognize him as the one they were supposed to find alongside Zack, and help him recover over the next two months. (Why not just turn him in? Who knows, I'm not writing the story. But it seems Tseng's not too tight on turning them in, and maybe in addition to that, Rufus wants to know wtf really happened at Nibelheim and with Sephiroth and thinks Cloud is the key to figuring that out to create bad press for Daddy Dearest, etc.) Now, not only could that lead to an interesting situation in which Cloud is fighting alongside Rufus and against AVALANCHE, it'd also let the author plot out a completely different trajectory for Cloud's character (which could have a tremendous effect on how he reacts to Sephiroth's mindscrew).