I think the whole scenario is a set up for VV3! I know I just had to say it....
I think the original tribe left the children (and one adult, Tofu{food for thought?}) to go find the VV1 tribe to try and stop them from using magic and uncovering any and all artifacts.
Now this may not shock you but I also think that VV3 will have something to do with these "other" original villagers.
They might be "blown" off course and land on another island LOL!