FFX was the prequel to this, Really?

[Newmani]

IMO it just makes it easier to pretend that FF10-2 doesn't exist.

If I have to consider it valid, then I would say it is absolutely deplorable. It smells like bad fanfiction writing, trying to shoehorn in as many connections as possible to stamp it's mark. But that's what I think of the majority of the Compilation.

This is worse than bad fanfiction writing in my opinion. I've never played FFX but I have seen it before, and it has very little in common with FFVII. There's no materia, summons don't work the same, there's no real lifestream, it contradicts the fact that Shin-ra never actually made it to space because they found mako to be profitable after their prototype rocket never made it off the ground, and in general it's just plain incompatible with FFVII because if you think about it really hard, there's just too many differences and too many plot holes which can't just be handwaved.