@Icefae:
I haven't read the whole thread, but is there a concensus on the theoy that Ym could in fact be really small? We haven't seen how big they are on the throne (or how big the throne is for that matter). Perhaps the straw hat isn't giant but Ym is small?
This may sound asinine but it's possible maybe?
We don't see much of Imu in comparison to the Empty throne itself, since it's in the distance and hard to make out, but we do seem Imu climbing the stairs to the throne and, while the long robes and tall, spiky headpiece make it a bit hard to make out his/her figure, I think it looks fairly normal-sized, if somewhat on the slender side.
Just my read, though. Hopefully we'll get a better shot before the arc's over.
@dark:
I honestly have not read the entire thread, but I feel that if vivi happens to be in trouble at the reverie. It is not luffy who will save her, but the straw hat grand fleet. If we think about it, 2 of the captains are already there, and I am sure that they know how to contact each other. What if the foreshadowing of what Oda stated in the past that they did was saving vivi, and by doing that they would be attacking the world government.
If the WG goes after Vivi in any serious fashion, which is looking very likely to me at this point, there are basically two paths she can take: she will either be taken in by the Revolutionaries or she will head out to rejoin the Strawhats.
Regardless of which direction she goes, I can see her getting help from both the Revolutionaries (via Sabo, once he learns of her connection to Luffy) and the Grand Fleet members who happen to be present (Sai and Leo, particularly since they've already been introduced to her and are on guard over what happened to Shirahoshi). Considering the number of variables in play already in this arc, the moment the World Government makes its move will probably be the trigger that sets everything else off.