1572,the year of FF8.

[Zanius]

If you can it will help you see what the black thing is.
Also look at the weird shape of the castle´s floor near the edge.What did it resembles?
Note that the black thing seems to move like wind(it has nothing to do with the helixes theory).

The Balamb/Galbadia Garden. It creates a kind of circle wall that "breaks" the time barrier and then this vehicle can make a time travel…

[Future Esthar]

The Balamb/Galbadia Garden.

Exactly.

So,what is the black thing?

[Zanius]

The Garden's base which is used to keep the vehicle planning in the air?

[Future Esthar]

The Garden´s gauge.That´s correct.

[Christmas]

Those are black clouds to create a sinister effect on the castle.

[Future Esthar]

Time to post some screenshots!(Finish the game first).

[Christmas]

Take your time, you can alway come back ten years later or something, there is no hurry.

[Emery]

The Garden´s gauge.That´s correct.

Ahhh I see, that makes sense at least.

[Future Esthar]

By the way,yesterday I went to Trabia Garden for the flashback scene.
I noted something interesting.The missiles destroyed the Gauge.It was cut in half.And the gauge is black.It can fit the castle´s black wind very well.

[Christmas]

That is when it is burnt.

[Future Esthar]

I think even before the missiles hit the garden it looked as ancient as that.

[Zanius]

By the way,yesterday I went to Trabia Garden for the flashback scene.
I noted something interesting.The missiles destroyed the Gauge.It was cut in half.And the gauge is black.It can fit the castle´s black wind very well.

So the Trabia Garden will be transformed into the Castle in some far away future...

[Future Esthar]

I don´t know the meaning of that.
It´s hard to believe that Ulti´s time is after Trabia+Balamb time.

[Zanius]

Well you could admit that Ultimecia really belongs to the future instead from the past...

Like you said before the time order is irrelevant because the WOTC mixed up all time line from each area.

There are too many coincidences here...

[Christmas]

I think even before the missiles hit the garden it looked as ancient as that.

That is when you can actually see Trabia Garden when it is not destroyed.