I'm not denying that Takahashi's going to bring back some recurring themes of the Xeno series (pretty evident he is by the story trailer), and even assuming the Treehouse guys are not fully aware of Takahashi's direction for the plot, there exists a couple of major disconnects between Xenoblade's world and X's that more or less prevent any kind of continuity between the two.
Major end-game spoilers:
It's important we understand what Shulk and Alvis have done at the end of Xenoblade, and what happens to the world as a consequence. Shulk asks Alvis to recreate the universe so that it no longer needs Gods like Zanza and Meyneth. However - and this is an incredibly important nuance - he does not restore it to it to its previous natural state. Why do I say that, and why is that important? There are still remnants of Klaus's perversion of the universe's natural laws, one namely being ether. Ether still exists at the end of Xenoblade; they use High Entian technology (and tech. in Xenoblade's world is powered by ether) to restore Fiora's body.
Now, with that in mind, take a look at this:
The attack the Doll uses to to decapitate the アンフィコエリアス (Amphicoelias, which is now called アダマン・ミレザウロ - Adamant Millesaur in English, I thnik - as a pointless aside), 反物質バスタード （近接）, translates to "Antimatter Bastard (close-range/melee/whatever)". Antimatter is the key term there. It tell us what kind of technology they're using, but more importantly, it tells us that X's world abides by the natural and correct laws of the universe and the scientific principles that we understand based on them, as opposed to Xenoblade, where everything consists of ether and not matter.
Furthermore and continuing off of my first point, Earth is not restored to its pre-Klausfuckery state; the Earth as we know it, with all of its countries, peoples, etc. - the same Earth (of the distant future) that explodes in X - is simply not the same as the one that's reborn at the end of XB.
Furthermore and continuing off of my first point, Earth is not restored to its pre-Klausfuckery state; the Earth as we know it, with all of its countries, peoples, etc. - the same Earth (of the distant future) that explodes in X - is simply not the same as the one that's reborn at the end of XB.
What X is, from what I'm seeing, is a game that incorporates an amalgamation of certain ideas and premises from past games, but largely remains its own thing. Now, it's true that Takahashi's said that he always leaves room for sequels in his works, and we could get a veritable Xenoblade sequel at some future point, but right now, there's this enormous gap between the worlds of this these two games for me to think that they're in any way related.
