I am actually really surprised X did so well. It did so well, it was the first in the franchise to create a true sequel to the game. However, despite this success, it still isn't one of the more iconic titles in the series like I, IV, VI and VII; the very same titles popularized by American culture due to those games being released in the US with only VII coming in via the wave of next gen consoles at the time. VII is also the one that has very little collaboration with XIV as far as the character's go. We have minions, a limit break using the buster sword, materia, the MGS, outfits, cosplays, the list goes on with the exception of any of those characters and/or plots showing their face in Eorzea or the First.

Blitzball has been brought up several times, and I think Yoshi is reluctant to bring it into the game (not official, just my thoughts). It can't exist as it did in X. It was all RNG, and if it was to be here, there needs to be some element of skill involved.

Anima would be a wonderful, wonderful raid!

Pretty sure Wakka's class designer was on something. I would not expect any volleyballs to make the final cut as a weapon design.

I think a lot of players want to see this with the FF title they love the most. I've been waiting for them to do more with IV for the longest time. There are some callbacks but nothing to the extent the other titles have recieved.