i think...(my english is not good,if i have some mistakes,you just leave it...)
i think it must be some relationship between sora and ven(i have seen some of your reply,and..it just my conculsion)
some of you said that besides the look and the name,ven isn't have anything smiliar with sora,i agree with you,but why Tetsuya Nomura did this thing?i don't think that he just follow the three ppl team,it must have something...
and about terra,i also saw one of you reply said that terra's body was took by the master,i think it is not impossible,because in kh2...terra just "appear" in a suit of armor,not his real body...we can have a statement that terra's "soul" is in the suit of armor,not his real body...
i have nothing to say about aqua and kairi...because beside their are girls and have a name meaning of 'water',they have no relationship and aqua isn't appear in the news...
(but if you said i think ven and sora have relationship but aqua and kairi are not?..this is wron..because i don't think they have no relationship but it is nothing to support them,and ven and sora have relationship is just my feeling..)
i have a new idea...birth by sleep...it can be said that something was born because of someone have slept...can i said that?....kairi was born because of terra's sleep...and the doctor sent kairi to the island because of he want a guy to inherit terra?....at last...ven and aqua is 'disappeared', if...if they were died...is it can be said that they use their power to 'born' kairi so kairi is he princess??
(I don't know what i am saying...)
and last,if you have such a time to read my bad grammar english,
THZ....(because i am a hongkonger in 15years old...i will learn more english...THZ!)