That's quite similar to the case of ว่า in Thai. I kept thinking about it since Araucaria post the "antecedents" question. It wasn't unclear to me whether ว่า (which is normally translated as that, and its usage is very, very similar to that) heads a subordinate clause or not.
My latest idea about it is that even though ว่า (read "waa") can be used very much like that, it's not truly identical to that. I think it can be thought of as a conjunction, but because Thai syntax isn't very rigid (think "sponges", versus "bricks"), I don't think we should really think that it's the head of its subordinate clause. (I think that it just acts like an optional linker to link the main clause and the subordinate clause together.)
My reason was something like:
- ฉันรู้ว่าเขาเป็นคนดี (lit.) I know that he's a good man.
We can omit ว่า (ฉันรู้เขาเป็นคนดี (lit.) I know he's a good man), but there are several other ways to phrase the same thought, e.g., using นะ (read "na") in the place of ว่า (ฉันรู้นะเป็นคนดี (lit.) I know, he's a good man); using นะว่า (ฉันรู้นะว่าเป็นคนดี (lit.) I know, that he's a good man); using ว่านะ (ฉันรู้ว่านะเป็นคนดี (lit.) I know that, he's a good man) -- I tried to simulate the particle นะ with commas.
Then we have a few more variations, e.g., แบบว่า (read "baepwaa") นะแบบว่า (read "na-baepwaa") แบบว่านะ (read "baepwaa-na"). แบบว่า is usually translated as sort of or like (though it's not necessarily so). So, ฉันรู้แบบว่าเป็นคนดี ~ (lit.) I know like he's a good man.
So it's a bit complicated, and that's why I think it's best to avoid thinking of ว่า as the head of a subordinate clause, even though I won't object to such an idea.
Oh, Dreamworks is making anime, too, now!
I remember a similar anime from my childhood. In this genre, the gigantic robot would need five drivers, one for the left arm, one for the right arm, and the same for the left leg, the right leg, and the head. Me and my brother used to pick to choose (to pretend) who was going to drive which part. :P
It's amazing that these themes can stand through decades. (Just like superheroes, like Batman and Superman!)