Also, considering the possible Phantom move is a summon, between the two pics (Phantom and Link/Peach), Zelda could be caught in different animation frames
For sure.
I think it's not too far-fetched to say the pose from the link and Peach screen happens after the one on the phantom screen. That said, it would be weird to have a screen where the phantom is here with an "incomplete" animation, and yet having a screen with the "complete" animation.
But the phantom could be somewhere else on the Mario Galaxy stage, offscreen.
But, Wario have to different animations if he can summon his bike, or if it's already on the stage. BUT the Zelda animation can be the same as it would only be summoning, not riding the armor.
Who knows?
Or the Phantom can be summoned from a distance beyond the perspective of Link and Peach.
Well, nothing is impossible, but it would be weird if Zelda could summon the Phantom from a good distance (she is quite far away from Link and Peach in this picture)
There is absolutely no way to know if this pose is a taunt.
Again, for sure. As for now, it can be anything (well, not anything... but we don't what it could be). But seeing the characters retained a lot of their previous animations, I wonder what it can be.
Edit: Guys... Having the picture in a bigger format made me realise a thing.
It's, in fact the exact same pose, at the same frame. Since her reveal, everyone (including me) kept telling it was almost the same pose, but it's in fact
exactly the same. We can finally see that her arm is not totally extended, like in the phantom screen, and we can see better that the palm only seems to be more open. It's just the angle of the screens that make it looking different.
Also, about this pose, it share similarities to a frame on activating Din's Fire (wich could explain the lack of effects)