Don't bash me too hard because I've only recently started getting into theorizing and whatnot. I've read a lot on here which is why I finally got an account.
Anyways this is just a thought perhaps you guys can help prove or disprove it, whichever, but is it possible that Jabu Jabu is the Wind Fish? I couldn't dig up any old threads if this has been discussed and I'm sure it has. My reasoning behind this is the Wind Fish's nightmare which includes Agahnim, Ganon, and the last form who resembles Vaati (and I know that is only speculation), but is it possible that the reason he is having a nightmare about them is because he's seen them before? Is this why they are nightmares, because they're scary or bad, something that ya know, would cause you to have nightmares? Of course the Windfish could not be Jabu Jabu and still have seen Agahnim, Ganon, and Vaati, but if you place
TMC first in the timeline as I do then that would have to make the Windfish old enough to have seen Vaati however long ago
TMC happened which would have been before
OoT making it possible for him to be Jabu Jabu. Then of course their could be a future game lined up (like the new Zelda for Wii) that could include Vaati thus the Windfish seeing him there. And of course Dethl could not be Vaati at all, I just personally believe it is.
I know people say that Dethl could also be just a recycled one eyed monster, but here is why I don't think so.
Vaati's Wrath looks like this
http://www.zeldadungeon.net/Zelda10/...atisWrath1.gif
And Dethl looks like this
http://www.zeldawiki.org/images/5/5e...28Dethl%29.gif
The way the arms are circled as they are just looks too similar although they could have just based Vaati's design off of Dethl.
Another idea I had was while the nightmare as a whole is the final boss, why would it's final form just be a random one eyed monster? I mean it could be, but personally I believe it's Vaati. Perhaps somewhere along the timeline before the events of
LA Vaati does something that makes him a lot more of a threat or something to fear than before.
Anyways yeah that's just a thought although I guess it really doesn't affect anything haha, feel free to help out and prove or disprove me guys I'm open minded.
EDIT: I know that Dethl is the name of the final boss/nightmare, but if you see me referring to Dethl I'm talking about his final form not the whole boss.
The Wind Fish's wings are rather small as pictured here.
http://i10.photobucket.com/albums/a1...dFishWings.jpg
The things on Jabu's back could be fins or something I guess, or perhaps they're small wings?
http://i10.photobucket.com/albums/a1.../JabuWings.jpg