[barnstenchfartface]

What I'm expecting to have happened is that the mother (Already pregnant with Takeru) got the red sky disease (since the Ganma world already looked kinda red in the flashback. Maybe it was just the sunset, or maybe they started getting the red crap later, but...) so they try to send her to the human world, since it lacks the pollution. But something goes wrong and she gets sent far into the future, where she meets Ryu, Takeru is born, she dies, and Ryu takes care of him.

Or something like that. My speculation sounds very contrived, but eh. If it actually ends up happening, it'll likely be pretty contrived as well.

Guess we'll find out sooner rather than later.